Waterway 417-2201 2 1/2 inch tailpiece with piston o-ring grooveWaterway 2 1/2" Tailpiece with Piston O-Ring Groove, 417-2201 In stock$1199
Waterway 417-2201 2 1/2 inch tailpiece with piston o-ring groove
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Waterway 2 1/2" Tailpiece with Piston O-Ring Groove, 417-2201

Ask a questionMPN 417-2201
$1199
In stock
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Quick overview

  • Genuine Waterway The factory 417-2201 tailpiece, not a substituted fitting.
  • 2 1/2 inch size Matches the 2 1/2 inch port it was made for, so nothing has to be adapted.
  • Piston o-ring groove The groove is what carries the piston o-ring and makes the seal, and it is the reason a generic tailpiece will not do.
  • Crystal Water cartridge filters Used on the Waterway Crystal Water cartridge filter family.
  • O-ring sold separately Waterway lists the 2.5 inch tailpiece o-ring as its own part, so order it at the same time if the old one is flat.
  • Replace a leaking joint properly A tailpiece with a scored or worn groove will keep weeping no matter how many o-rings you fit.
Full description and specifications ↓

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Product details

The Waterway 417-2201 is a 2 1/2 inch tailpiece machined with a groove for the piston o-ring. It is a Waterway filter part, used on the Crystal Water cartridge filter range.

Why the groove matters

A plain tailpiece is just a pipe connection. This one has to do more: the groove around it holds the piston o-ring, and that o-ring is what actually seals. If the groove is worn, scored or has been chewed by an over-tightened fitting, the joint keeps seeping however many new o-rings you push into it, which is usually the point at which the tailpiece itself needs to come out.

Before you order

Check the size. This is the 2 1/2 inch tailpiece, and Waterway makes others in different sizes under their own part numbers. Waterway also sells the matching 2.5 inch tailpiece o-ring separately, so if the old one is flat, cracked or has taken a set, replace both at once and you will only do the job the once.

Specifications
Brand Waterway
Manufacturer part number 417-2201
UPC 806105195227
Type Tailpiece with piston o-ring groove
Size 2 1/2"
Part type Pool filter part
Used on Waterway Crystal Water cartridge filters
Shipping weight 0.4 lb
Ships Parcel

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Questions and answers

What people ask about this product, answered by our pool techs.

Does the o-ring come with it?
No. The 2.5 inch tailpiece o-ring is a separate Waterway part, and it is worth ordering alongside if the existing one is flattened or nicked.
What is the piston o-ring groove for?
It seats the o-ring that seals the piston against the tailpiece. Without that groove the seal has nothing to sit in.
What size is this?
2 1/2 inch. Waterway lists other tailpiece sizes under different part numbers, so match the port you have.
Where is this part used?
On Waterway Crystal Water cartridge filters. If yours is a different Waterway filter family, check the part number before ordering.
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