Does A Backflow Preventer Reduce Water Pressure?

Does A Backflow Preventer Reduce Water Pressure?

Note: As an amazon associate I may earn a small commission from qualifying purchases if you click to amazon from my site and choose to make a purchase.You can read my complete affiliate disclosure for more details

Does A Backflow Preventer Reduce Water Pressure?

A backflow preventer installed in the hot water system can reduce the pressure as long as you properly install it.

The backflow prevents toxic chemicals, such as chlorine and copper, from reaching your plumbing and drinking water system when cold water flow from the main shut-off valve gets reversed into hot-water pipes.

These chemicals are highly corrosive to metals and other materials in the plumbing systems.

Yes! A backflow preventer can reduce water pressure, but you can lessen this reduction if a bleed valve is present and opened. Water hammer results from a leaky pipe and occurs when water comes back into the pipe and hits a sharp turn or bends. This area get pressure builds up causing a loud ‘knocking’ noise at low flow rates.

The usual causes of low water pressure are:

  1. You will find many fixtures/appliances connected to the water supply pipes. If a fixture is oversize, it will use more water than smaller fixtures.

If not enough hot water is being put into the system, colder water farther away from the boiler will replace it. This results in low or no pressure.

  1. Check for leaks. A hand-held showerhead leaking water onto the floor will decrease the pressure in the system.

Relief valves often leak. The best way to prevent water hammers is to ensure that all relief valves are working properly.

  1. If you installed a device such as a backflow preventer or water softener, a plumbing leak may exist nearby.

Commonly, you will find leaks under the sink or in the shower/tubs area by inspecting fresh and incoming pipes for corrosion stains and holes.

  1. Inspect your water heater regularly for leaks and wear. A worn-out water heater will not provide enough hot water to the other fixtures in your home.
  2. If you turn the cold water on first, then the hot water, it can take time for the new piping to heat.
  3. This can cause low pressure, which you must correct by turning on a larger amount of hot water; this will quickly solve the problem.

Does A Water Softener Need A Backflow Preventer?

A backflow preventer is a device installed near a potable water supply to prevent the backflow of wastewater (usually from toilets) into drinking water supplies.

The device has one or more valves that, when closed, prevent the flow of wastewater through the device and into drinking water pipes.

Does A Backflow Preventer Reduce Water Pressure?

This helps avoid contamination and keep your family safe if you ever suffer a sewer or water line backup.

Yes. A water softener needs a backflow preventer to keep the reverse osmosis membrane system from contamination. A backflow preventer is also essential if you use your soft water elsewhere, like in your garden or carwash.

A backflow prevention device prevents contaminants from entering the drinking water supply and is a requirement when installing new plumbing fixtures like faucets and toilets.

A backflow prevention device also protects against contamination caused by poor drainage conditions around an installation site.

The cartridge filter and the plug-in diverter valve are the most common backflow prevention devices.

Flow through a water filter, such as a sediment filter; one can alter this by backflowing the water. This may contaminate the system.

You mount a backflow preventer outside the water pressure plumbing system to block the flow of contaminants from entering these systems.

When sand or other contaminants collect in the backflow prevention device, they may interfere with the operation of the water softener.

Replacing the backflow prevention device will ensure it is clean and operationally ready to protect the system.

In a home, backsplash preventive measures may be necessary to keep this type of contamination from becoming an issue.

Backflow preventers should have a bypass feature for short-term use, such as during plumbing repair.

A home water filtration system should also have a backflow preventer to prevent water from entering the house from contamination from the outside environment.

You will often find water filtration systems permanently connected to the home plumbing system, but you need a bypass for periodic cleaning.

You should install a backflow preventer in front of the water filter to protect it and ensure it is clean and operational.

A backsplash preventive measure may also be necessary to prevent contaminants from entering the system through outside plumbing.

When you install the water softener in a building, you need a backflow preventer to keep contaminants and other debris out of the water entering the building.

An under-sink installation requires that all the plumbing connecting to the water softener be in contact with both sides of the relief valve.

Does A Water Softener Need A Check Valve?

Yes. A water softener needs a check valve, and the function of this valve is to make sure the flow of water flows in one direction only.

Otherwise, if it were to flow in both directions, you would have a problem over-saturating  salt pellets. This would make them unusable.

The check valve ensures you add new salt as needed without causing an overflow or unexpectedly high pressure on the system while also preventing salt from leaking out or spilling into your plumbing and becoming an environmental hazard.

This valve is an important part of a water softener system and clogs or needs replacement often.

Does A Backflow Preventer Reduce Water Pressure?

If a check valve were to fail, it could cause damage to your home, so it’s important to make sure this component is in good working condition.

The way the check valve works is such that a small amount of water trickles out of the softener through the valve.

When you start a new cycle, it’s filled with salt, and as the salt dissolves, its pressure draws in more water to replace it.

There are not enough high-pressure water molecules left in the softener to fill it, so they must find their way into other places: leaking out or flowing towards an alternate exit, your drain or toilet.

If any of this water leaks out, the valve needs replacement since it’s clogged, but it could lead to plumbing problems if it’s flowing out towards a drain or toilet.

Most likely, what will happen is that your toilet fills up with water and flushes slowly or even backflows into your house through the drain pipe.

The only exception to this will be if you are using a tankless water heater where there is no drain line.

Thus, your only option is to call a plumber to have the valve replaced; otherwise, you’d have to live with the ongoing damage until it’s fixed.

What Does The Float Do In A Brine Tank?

The float in a brine tank ensures that the level of brine stays at a constant height and automatically drains away any excess liquid.

The float comprises two parts: an air-filled section resting on top of a brine-filled section.

When the tank’s level is low, for example, when it’s 10%, the air section will sink and break the contact with the brine below.

This prevents any more spills out without adding more water to maintain levels. This will continue until the tank refills to 80% when the float will rise and restore contact with the brine.

The float continues this process and stops once the level gets down to 60%, at which point you must manually top it off again.

The float may rotate mechanically to increase or decrease its sensitivity.

This can control how quickly the float responds to changes in brine level and prolong its lifespan because of a less strenuous job.

You must regularly maintain the float to ensure its effectiveness. Maintaining the float is easy, as it’s a rubber section that you can easily wipe clean with a damp cloth.

Can Water Softener Drain Into Septic?

Yes. A water softener can drain into the septic. However, many important considerations prevent the problem before installing the water softener.

The septic tank should always have a clean-out plug on top of it, which extends below the septic tank elevation.

This will allow fluids and solid waste in the tank to enter a hose that brings them outside the house. If a plug is not present, installers should recommend installing one.

The drains from both tanks should never connect without a two-way valve installed in between that allows fluid back into both systems when needed.

The installers should also ensure the correct installation and elevation of the water softener (when connected to the tank).

Finally, hard-water areas may have special problems testing the ability of a softener to work in those areas.

With all these in place, I recommend using a water softener. Sometimes, the installation may not be necessary.

You may need it to pre-treat a system that’s already installed, but you will not need it if you have not installed it.

Water softeners are the single most effective method of removing lime, calcium, magnesium, and other minerals from water. They use a chemical process to soften water.

The plants easily absorb the softened water and are less corrosive to pipes. Many softeners do different things, but all make the water softer and easier on our appliances.

Is Water Softener Discharge Pressurized?

Yes. This means that the sun is actually “solar-powered.”

The water softener uses up to 0.25 units of energy each day from the sun, which powers several pumps and controls all the ion exchange processes that improve water hardness and color.

One unit of energy (=0.25 watt-h) is enough to run a basic incandescent light bulb (e.g., 40 watt-h or 2.4 H.P.) for 24 hours straight.

The daily energy consumption of a water softener varies from 0.1 to 0.6 units, depending on the system capacity and the water quality conditions, such as hardness and alkalinity (which you can measure more easily than color).

So when you see a product on television that says it “uses ten units of energy every day.”, this means the product will last ten days before running out of energy or getting discarded because it broke down.

Can Boiler Condensate Drain To The Ground?

If your water softener is no longer energy-efficient, you can take some simple actions to increase its efficiency.

You can reduce the regeneration frequency resulting in cost savings of up to 50% (depending upon your water quality and system capacity).

Regeneration is the process that removes hardness-causing minerals like calcium and magnesium from the ion exchange resin, bypassing the resin over an era/water mix that has one conditioned with sodium or potassium hydroxide.

Regeneration also oxygenates the water to improve its sanitizing properties. The resin may become “saturated” with hardness, requiring more frequent regeneration.

Some homeowners flush the softener regularly with water or pour vinegar into it (its acidity will dissolve the resin even though it is a mineral-based material).

However, maintaining system efficiency does not result in net savings on your power bill.

Can A Water Softener Discharge Into A Soakaway?

No. You should not pump the water from a DIY water softener into an unauthorized discharge site — such as a soakaway or septic tank — as that is not intended to use a water softener.

It would be best to only pump the discharge from a DIY water softener into an appropriate drainage system.

For example, if you are using your well to collect your rainwater, you will need to build an underground soakaway to dispose of the collected rainwater safely and legally.

A soakaway is a self-draining overflow tank that contains grooves for the incoming and outgoing clean or dirty water to separate.

It would be best to pump the discharge from a DIY water softener into the soakaway. Note that some municipalities require the discharge to go into a detention basin.

Confirm with your local government if you have questions about this requirement.

It would be best if you only pumped the discharge from a water softener into an appropriate drainage system for safe disposal of finished goods.

And, as authorized by your state wastewater (sewer) plant operator or local solid waste agency.

Discharge from a DIY water softener is not potable water, and you should not use it for purposes other than those intended.

Can You Use Water While The Water Softener Is Regenerating?

No. You cannot use water while the water softener is regenerating.

If a water softener is regenerating, it has lost much of the mineral ions that dissolved in the water. Those minerals are now gas, thus released into the air.

Just like things can get dirty, a water softener can lose its ability to filter minerals and create soft water by releasing them into the air as a gas.

This is not just unpleasant for you but also for everyone else if you release too much gas.

There is a very important reason a water softener needs to regenerate during the regeneration time frame.

If it doesn’t regenerate, then it can produce low-quality water that may not have enough particular minerals dissolved in the water.

When a water softener is regenerating, it loses these minerals. If you were to wait until the minerals dissolved in the water naturally get replenished, you would wait forever.

A water softener needs to keep regenerating during this period to keep those vital mineral ions dissolved in the water.

It needs to do this because otherwise, it cannot produce healthy and tasty soft water.

So the only option you have is to wait until the water softener has finished regenerating before using it again.

You should try to space out your regeneration and usage as much as possible to avoid releasing too much of those mineral ions into the air.

Does The Code Require A Backflow Preventer?

Yes. A backflow preventer must have an International Plumbing Code 2006 608.16.A.1 installed on the property.

The International Plumbing Code 2006 608.16 states that all fixtures should have backflow preventers installed by code to protect public safety.

There are multiple types of backflow preventers, each with its purpose and use. There are four main types of backflow preventers interconnected in protecting public safety.

The four main types are:

  1. Softener Backflow Preventers (SFPs)
  2. Drinking-Water Backflow Preventers (DWBs)
  3. Household Pressure Reducers (HPRs)
  4. Potable Water Treatment Chemicals.

There are two basic types of SFPs, an older style and a newer style. The newer style of SFP is much safer, with a much stronger backflow prevention design.

SFP’s new style is easily identifiable by the self-cleaning design of the valve.

The newer style valves have a large triangular piece of metal that unscrews, allowing access to the internal parts of the valve.

You can unscrew this removable triangular piece to remove any particles, clean all internal parts, and easily re-screw back when finished.

The older style SFP has a unique design that does not allow for easy access to any internal parts;

The way to clean is by using the special fluid (sold separately) to clear out ANY particulates that may block access into the valve.

Is Cross Connection The Same As Backflow?

Yes. To simply put it, cross-connection and backflow are the same things.

When you use these terms, the only difference is that if a plumbing professional uses the term “backflow,” they usually refer to improper installation or imperfections in a piping system.

If an EPA specialist is using the term “cross-connection,” they’re talking about water mixing from one source (like a toilet) to another (like a sink) when they’re not supposed to. So yes, they’re the same thing.

Backflow happens when liquid is illegally flowing backwards into a drinking water system (like your home’s plumbing), possibly because of a leaky connection or just aging pipes.

Backflow can happen in three ways:How cross-connection works

  1. If connecting pipes have cracks or have part of the seal missing
  2. The liquid can leak backwards if you have back-pressure in your plumbing system. You can also prevent backflow by avoiding air pressure in the pipes and ensuring that your plumbing system has proper balance.

Checking for cross-connection is also important because it can pose a major and serious risk to public health if the water has contaminated.

The EPA regulates public drinking water and all its sources, from treatment facilities to individual household plumbing systems, including those operated by private individuals or businesses.

However, it’s up to the homeowner to act to prevent cross-connection and backflow in their home. It’s not something you can ignore.

Although this may seem easy for a professional plumber, it is also possible to perform this task yourself if you have the right parts and tools.

However, one thing to remember is that improper installation and repair can cause further damage and lead to bigger problems down the road.

How Can One Tell If They Have A Backflow Valve?

Telling if you have a backflow valve is easy. The plunger should be in the pump chamber during pressure testing if you have a backflow valve.

If there is no plunger in the pump chamber, you do not have a backflow valve.

Many gas pumps now need a backflow valve for safety reasons. This is to prevent toxic fumes from leaking out and harming those nearby and any other person who could use that particular gas pump later on.

Very Small Backflow Valve Tubes: These are great to use if you install a very old gas station.

Many previously built stations have tiny shut-off valves when the current is off at night.

You have to replace the valve with a regular-size canister backflow preventer (about $10), but it will last for years without replacement.

Flow Restrictors: They built these into most parking lot generators, electric car chargers, and other electric loads that generate heat. It is because of a burn hazard.

Valve Assemblies: There are two main types. Each type has its advantages and disadvantages.

-The first type is like the plate or ball valves found in most homes and gas stations. These valves will look very familiar to you and have the same shape.

It is the same basic configuration, but they have a rubber diaphragm that seals the fluid. You only need to figure out the flow rate and then order a specifically sized valve assembly.

-The second type of backflow prevention device is a little more complicated. Here, there is a double chamber. They will look like they have an inner part and an outer casing.

The inner part contains the plunger and will also contain seals to prevent leaks into other chambers. The outer casing comprises rubber, preventing leaks into other chambers.

Usually, you find two different-sized valves included, match the inner and outer parts correctly. The best part about the valves is that they are less expensive than the first types.


Backflow preventers are very important as they can prevent your drinking water from dangerous chemicals contaminating it.

Using a backflow preventer in hot water applications can significantly reduce the pressure, which is something to consider. If a building has many fixtures and appliances, these can also affect the pressure.


Hi! I I faced many questions from customers about different products, and there was hardly any help on the internet. After learning all the things about these products as a manager the hard way, I decided to start a blog and help other people.

Recent Posts