SHURflo 255 Water Pump Strainers — Connection & Parts Diagram

SHURflo's 255-series strainers sit on the inlet side of compatible fresh-water pumps and keep sediment away from the pump mechanism. All four versions use a removable clear bowl and a 50-mesh stainless-steel screen. The main difference is the inlet fitting and how the strainer attaches to the pump. Use the connections on your existing setup to select the correct one.

Compare the strainers available on UsedRVParts

Which SHURflo 255-series connection do you need?

Aftermarket part OEM number Water-line inlet Pump-side connection
255-313 255-213 1/2-inch NPSM pipe thread Threaded, twist-on
255-323 255-223 1/2-inch hose barb Threaded, twist-on
255-315 255-215 1/2-inch NPSM pipe thread Female swivel nut
255-325 255-225 1/2-inch hose barb Female swivel nut

The 255-323 is included to help identify the four factory variations. Only the three linked versions above are shown as products on this store. Check the complete model number and inlet fitting before ordering; the similar clear bowls do not mean the fittings are interchangeable.

SHURflo 255 strainer components — exploded view

The manufacturer's drawing identifies four parts inside the strainer assembly:

  1. Top housing: contains the water-line and pump connections.
  2. Gasket: seals the removable bowl to the housing.
  3. Screen: traps sediment and can be lifted out for cleaning.
  4. Clear bowl: catches debris and lets you see when cleaning is needed.

Factory diagrams and part illustrations: The PDF below includes photographs of the four connection styles and the numbered exploded drawing. Select the image below for a larger view.

Pentair SHURflo 255 strainer reference with four model photographs and numbered housing, gasket, screen and bowl drawing
255-series strainer models, port styles and assembly. Tap or click the image to enlarge the part numbers.

Open the SHURflo strainer diagram (PDF)

Cleaning the strainer

  1. Switch off power to the fresh-water pump and relieve water pressure.
  2. Unscrew the clear bowl counterclockwise and remove the screen.
  3. Rinse debris from the screen and bowl, then check the gasket and housing for damage.
  4. Return the screen to the top housing, seat the gasket in the bowl and screw the bowl back on clockwise. Check for leaks after restarting the system.

Install the strainer on the suction side of the pump, never on the pressurized outlet line. Pentair specifies a maximum liquid temperature of 120°F (48°C) for this series. See SHURflo's installation and maintenance instructions (PDF).

Related pump parts guides

For replacement pump assemblies and different repair kits, see the SHURflo Revolution 4008 parts guide and the SHURflo 4048 high-flow pump parts guide. These guides cover different pump models; compare the complete model number before choosing parts.

Identify inlet strainers in the tank-fed pump circuit

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