Pentair .75″ SS Air Vent Strainer | 172855

Pentair SKU: PEN172855
Pentair .75″ SS Air Vent Strainer | 172855 - Pool Filter Parts - img - 1

Pentair .75″ SS Air Vent Strainer | 172855

Pentair SKU: PEN172855
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Pentair 172855 Air Relief Strainer Assembly – ¾″

Part Number: 172855

Description

An OEM replacement air relief strainer assembly designed to safely vent trapped air from D.E. and cartridge filter systems. This part helps maintain proper pressure and flow by preventing air buildup in the filter tank.

Compatibility & Fitment

  • Compatible with Pentair FNS, FNS Plus, Clean & Clear, and Quad filters requiring a ¾″ air relief strainer.
  • Recommended when the existing relief is cracked, leaking, missing, or unable to vent air properly.
  • Drop-in replacement for installations specifying part number 172855.

Features & Specifications

  • Size: ¾″ connection port.
  • Body dimensions: approximately 1¾″ diameter × 1½″ height.
  • Dust and debris screen with stainless mesh and rubber base for long-life service in pool filter environments.
  • Helps ensure safe operation by reducing air-pocket related disruptions and maintaining consistent flow.

Installation Notes

Turn off the pump and relieve system pressure. Remove the existing relief assembly and inspect the port threads. Install the new 172855 strainer assembly, hand-tighten and finish with a tool if required. Ensure no leaks and proper air venting, then restore circulation and monitor system behavior.

Maintenance Tip

Inspect the air relief strainer each service interval: ensure the mesh is clean, the rubber base is intact and air is venting freely. Replace immediately if flow is restricted or the body is damaged to maintain filter performance and prevent bubbles or pressure irregularities.

Hours Of Operation: 

Monday - Friday: 8:00 am to 4:00 pm Phoenix Time

Saturday and Sunday: Closed

  • Orders costing more than  $300 WILL be required to have signature confirmation upon delivery.
  • Handling time is typically only 1 day.   
  • Any item ordered after 1pm Phoenix time, may not ship same-day.
  • Call us if you require expedited shipping and we can give you quotes based on your needs.

Return Policy:

  • All products, except as noted below, are eligible for return up to 30 days after receipt of item.
  • For returns, an RMA form must be filled out HERE or customers can call for additional help.
  • Shipping costs will be deducted from all returned items.
  • Any item that is missing accessories, original packaging, or is not returned in the same condition that it was received in, may be subject to a re-stocking fee up to 100% based on the condition we receive it in. 
  • Items broken, damaged, or inoperable due to installer error will not be refunded.
  • Fill out the return form or give us a call to obtain an RMA and return shipping label.
  • There are no returns on the Pentair Colorsync 618031
  • No returns on pool cleaners.
  • No returns on opened seals and o-rings.
  • No returns on capacitors.
  • If a light is returned because it "doesn't work" and it tests fine, the cost to ship and a re-stocking fee will be deducted from the refund.
  • All products denied upon arrival at customers house WILL be charged the cost to ship.
  • Visa Gift Card Promotions: Gift cards are sent within 14 days of the order. When accepting the Visa Gift card, you agree that if your order is returned or refunded, this amount will be deducted from the refunded amount. All Visa Gift cards are sent via email in an E-Gift Card format and are non refundable.
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