What are the various types of Strainers for houses? 

In this blog post, you’ll read:A strainer is a pipe fitting that liquid flows through to clean, filter, or separate it from solids. It can also strain the liquid or any device that acts as a sieve or filter to keep solids from mixing with a liquid stream or flowline
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A strainer is a pipe fitting that liquid flows through to clean, filter, or separate it from solids. It can also strain the liquid or any device that acts as a sieve or filter to keep solids from mixing with a liquid stream or flowline. Strainers catch scales, rust, dovetail joints compound, and weld metal in pipes. It protects machinery and processes from their bad effects and reduces downtime and maintenance.

To protect expensive and important equipment like pumps, flow meters, steam traps, control valves, etc., you must use the right strainers in the right places (usually upstream).

Types of Plumbing Strainers

  • Y-Type Strainer
  • Basket Type Strainer
  • Duplex/Twin Strainer
  • Back Nut Strainer
  • Flange Strainer
  • Double Cup Strainer
  • Level Strainer
  • Drain Strainer
  • Stopper Strainer
  • Temporary Strainers
  • Special Type Strainers

Y Type Strainers

The filter leg of a Y-type strainer connects to the main pipe at an angle, giving the strainer its “y” shape and name. This type is often used in lines with pressure, such as steam, liquid, gas, vacuum, or suction.

y type strainers
y type strainers

Y-shaped strainers usually can’t hold as much dirt as basket-shaped strainers, so they need to be cleaned more often. It is usually not a problem on steam systems, except when rust or debris can get in right after the system is turned on.

Specification of Y Type Strainers

End ConnectionFlanged or Threaded
Size0.5-inch to 24-inch
Filtration Rating1 micron to 1000 microns
Pressure RatingUp to 100 PSI

Configuration of Y-Type Strainer

A Y-strainer can be set up either parallel or perpendicular to the flow of water (Downward flow). It makes it the strainer screen possible to catch particles at the lowest level of the screen.

configuration of y type strainer
configuration of y-type strainer

Advantages of Y-Type Strainer

Cleaning is easy and doesn’t stop the machine from working.

You can choose from various perforations, mesh, and perforation mesh combos to meet the needs of your procedure.

It can be mounted either sideways or up and down.

Application of Y-Type Strainer

A Y-type strainer is useful for gaseous things like vapor, air, and natural gas.

Basket Type Strainers (T-Type)

This strainer works best with large particles and pipes that need to be cleaned often. Most of the time, basket strainers are used at pressures above 1,500 PSI. This strainer has been given different names, such as the tee-type, T-type, or pot type. Also, the basket-type strainers lower the pressure less than the Y-type strainers.

This strainer has a bigger area for straining, which means it can hold more particles. The other benefit of this strainer is that it can hold more debris, so it won’t need to be cleaned as often. One problem with the basket-type strainer is that it can only be put in pipes that run parallel to each other.

Also, the base of the strainers needs to be strengthened for the bigger basket strainers. The basket strainers have a cover at the end that can be taken off so that the filtering element is easy. This makes it easy for them to change the strainer or clean it when it gets full of debris.

basket type strainers (t type)
basket type strainers (t type)

When this strainer is put into the steam system, a lot of condensation is collected. A drain stopper and a steam trap on the steam strainers catch the droplets.

Specification of T-Type Strainers (Basket Type)

Pressure Rating125 PSI, 150 PSI
Size Range40mm (1½”) To 300mm (12”)
BodyBrass

Application of T-Type Strainers (Basket Type)

Basket strainers can only be put on parallel pipes, and the base of a larger, bulkier basket strainer must be made stronger.

reducing strainers
reducing strainers

The cover of a basket strainer can be taken off so that the filtering part is easy to get to if it needs to be changed (due to stocked-up debris). When basket-style strainers are used on steam systems, they can collect a lot of condensates. So, steam strainers usually have a stopper for the drain and a steam trap to catch the droplets.

Duplex/Twin Strainer

As the name suggests, the duplex or twin strainers use two strainers to do the job. This is also a basket strainer, but it is called something else. When many things are going on at once, and it’s hard to clean between processes, the duplex strainers are a good choice. When you have two strainers, the straining process can be moved to the other basket when the first one is full.

So, the strainer ensures the filtering process will continue until the first basket is cleaned or replaced. This strainer has either plug-type valves or ball-type valves. This makes it possible to change the water flow from one basket to another. These strainers can only be put in pipes that are parallel to each other.

duplex or twin strainers
duplex or twin strainers

Also, they are great for pipes that are big or bulky. These strainers are also great for pipelines or programs that need to run all the time. When one basket gets full, the other is ready to take over.

Specification of Duplex/Twin Strainer

PressureUp to 2500 psi
TemperatureUp to 560 0C
Mesh size37 – 6730 microns or Mesh 3 – 400 (US)
Material bodyIron, Bronze, Carbon Steel, and Stainless Steel
Material meshStainless Steel
ConnectionFlange Flate Face (FF) & Raised Face (RF), Ring Type Joint (RTJ), Threaded, Buttweld, Socketweld

Application of Duplex/Twin Strainer

Basket strainers can only be put on parallel pipes, and the base of a larger, bulkier basket strainer must be made stronger.

application of duplex twin strainer
application of duplex twin strainer

The cover of a basket strainer can be taken off so that the filtering part is easy to get to if it needs to be changed (due to stocked-up debris). When basket-style strainers are used on steam systems, they can collect a lot of condensates. So, steam strainers usually have a stopper for the drain and a steam trap to catch the droplets.

Back Nut Strainers

A back nut strainer looks like a back nut on its top half and is attached to the plumbing system at the bottom of the sink. Its nut is good for the draining system of a house sink because you can turn it.

back nut strainers
back nut strainers

Standard Size of Back Nut Strainers

Bigger Size (inches)4.3×1.2×3.1
Smaller (inches)3.4x1x2.3

For example, if strange things got stuck in the filter and stopped the water from going where it was supposed to go.

In this case, the stuck particles will fall out when the rear nut of the strainer is turned.

Flange Strainers

The flange filter is one of the sink strainers that are the most expensive. It is one of the sink strainers with a lot of great features.  It works as a filter, back nut, removal, and water stop. This makes it a sink strainer that does everything. Most flange strainers are black with a matte finish.

It has a rubber ring under the cover to keep water out. To stop the water from flowing, push the nut into the drainage system so that it sticks. It has dimensions of 3x3x3, 4x4x4, or 5x5x5 inches.

flange filter
flange filter

Advantages of Flange Strainers

  • Easy to put up and take down
  • It can fit some sinks that have garbage disposal hooked up to them.

Double Cup Strainers

A strainer with two cups is something special. There are a lot of rubber and steel rings in it. It can be changed because it has two strong strainer cups and a rear nut filter. Most of the time, one cup is attached to the hole for the drain. The second one goes on top of the one that is linked. It can be taken off to clean.

The top cup is a wall, and the bottom holds things. It is usually built and made to keep the sink’s drainage system clean and free of debris. A two-cup strainer will not let anything big through.

double cup strainers
double cup strainers

Stainless steel & brass is used to make most of this strainer. It keeps rust from building up. It is 4x3x1 inches. Installing it is easy, and you won’t need a plumber’s help.

Advantages of Double Cup Strainers

  • Very durable
  • Stops debris from entering your pipe
  • Calm to clean
  • Can stop sewerage water flow

Level Strainers

If you want a standard sink strainer, you should get a level strainer. The level strainer doesn’t use a specific machine system or any other type of rubber technology. It is 6x4x1 inches. It only has a big net to keep big and small things from falling into the sink.

level strainers
level strainers

The level strainer works with a circular plastic stopper that stops the water flow when needed… It seems to have a simple structure and no nut system. Some level strainers have an extra rim that stops water. A level strainer is the best way to keep drains from getting clogged.

Advantages of Level Strainers

  • Very Reasonable
  • Easy to put up and take down
  • It can stop any trash, no matter how big it is

Drain Strainer

Drain strainers work very well and can stop food waste and other solids from going down the drain. Drain strainers have a strong metal screen or mesh that keeps things from going down the drain.

drain strainer
drain strainer

This strainer is the most popular type because it is the easiest to use. Just put it on the drain, and it will easily filter food. But you should know that a drain strainer can’t stop water from going through. Like level strainers, there is no way to permanently attach them to your drain, so they might float when your sink is full of water.

strainer
strainer

Stopper Strainer

The stopper strainer sounds exactly like a flash strainer with a built-in stop. Most stoppers have a screw in the middle that separates or connects them. It is 6.1x5x6.1 inches.

When the plug is in place, water can freely flow through the drain, and the strainer catches debris. When the sink is plugged in, the water stays there until the plug is pulled out.

stopper strainer
stopper strainer

Advantages of Stopper Strainer

  • Very Reasonable
  • Easy to put up and take down

Temporary Strainers

Temporary strainers are the best choice when money is tight because they cost less. Between the pipe and flanges are these strainers.

temporary strainers
temporary strainers

There are three types of temporary strainers, each with a simple shape.

  • Flat
  • Conical 
  • Truncated
three types of temporary strainers
three types of temporary strainers

Most of the time, these strainers are lower to the ground than basket strainers. The strainer tends to get messed up because so many things are going through at once.

Special Type Strainers

Several other special types of strainers on the market are also used for different things. The strainers are grouped based on their obvious features and the pipe systems. In some situations, you need to use a certain kind of strainer.

  • Magnetic Strainer

Magnetic strainers work well to stop pump seals from wearing out too quickly. Magnets make a magnetic field, which draws iron molecules to it. Iron molecules cause pumps to rust, which causes them to break.

magnetic strainer
magnetic strainer
  • Offset Strainers

Offset strainers work better on pumps close to the ground and require strainers. The output of this strainer is low, but the intake is high. Even though the pump is close to the ground, there is less chance of contamination.

offset strainers
offset strainers
  • Micronic Strainers

Micronic strainers get rid of particles as small as 5 microns by using a very small mesh. People use this kind of strainer to do things like separate water from fuel.

micronic strainers
micronic strainers
  • Reducing Strainers

With reducing strainers, you don’t need reducers. Using these strainers, you can reduce the pressure drop that happens when you cut the size of a pipeline.

application of t type strainers
application of t-type strainers

Material of Construction

Cast iron is the most common material for strainer bodies because it is cheap to buy. It is used in systems where the water pressure and temperature aren’t too high and where there aren’t a lot of thermal or mechanical shocks. Cast iron is mostly used for bigger potable water lines and many systems that don’t use potable water.

Bronze: For use in brackish, salty, and seawater, bronze is the best choice. It is often used to get water that can be drunk.

Carbon steel is used in places with high temperatures and pressures and where the material needs to be resistant to thermal and mechanical shocks.

Chrome-moly steel: It is used when temperatures and pressures are high.

Stainless Steel: Often, stainless steel is used where erosion is a big problem.

Strainer Screens

Strainers are of two types:

  • Perforated Screen
  • Mesh Screen

Perforated Screen

The sheet is rolled into a tube and welded together in a few places. These screens usually have holes between 0.8 mm and 3.2 mm in size. So, screens with holes can only be used to clean out general pipe debris.

perforated screen
perforated screen

Mesh Screen

A grid or mesh is made from small pieces of wire. It is usually put on top of a screen with holes, which acts as a cage for the mesh. You can make much smaller holes using a mesh screen instead of a perforated screen. It is possible to make holes as small as 0.07 mm. After that, they are used to get rid of small particles that would otherwise get through a screen with holes.

mesh screen
mesh screen

Key points for choosing proper Strainers

Flow Velocity

Flow speed and a pressure drop directly affect each other. The flow rate is likely to be slower if the material is thick.

Open Area Proportion

How long the strainer can work well before it needs to be cleaned is based on the ratio of open area to capacity. This factor also affects how much pressure loss there is inside the strainer.

Knowing how much the strainer is open is important because it shows when the mesh needs to be cleaned or replaced. When a strainer gets clogged, the pressure drops by a lot. When the Open area proportion is high, the media has a lot of particles or is very sticky.

Mesh Size

The size of the mesh determines how much the strainer can filter. The smaller the mesh, the more force it can hold. To find the mesh size of a screen, count how many holes there are in one inch. On the other hand, a 10-mesh screen has ten holes over that one-inch line.

The plus sign shows that molecules with a diameter bigger than that number can’t get through the mesh. A number with a minus sign means only particles smaller than that number can get through. For example, a +400 mesh means molecules 37 microns wide can’t get through. Molecules with a diameter of fewer than 250 microns can get through a -60 mesh.

mesh size
mesh size

Link Between Strainer Kinds and Pipe Alignment

Pipes are only sometimes set up so that they are horizontal. Only when the flow is going downhill can the pipes be in a straight line.

On the other hand, the best strainers for vertical pipes are the Y-type or tee-type basket strainers. This makes it easy to catch the particles and ensures the trash doesn’t flow back upstream.

On the other hand, the strainer is placed as low as possible so debris can be flushed out easily.

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