Purex JV18 rotor shaft O-ring for Pentair SM and SMBW 2000 series valvesPurex (Pentair) Rotor Shaft O-Ring, JV18 In stock$499
Purex JV18 rotor shaft O-ring for Pentair SM and SMBW 2000 series valves
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Purex (Pentair) Rotor Shaft O-Ring, JV18

Ask a questionMPN JV18
$499
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Quick overview

  • Rotor shaft seal The O-ring that seals around the rotor shaft inside the valve.
  • Purex part JV18 The number to quote when a parts list points at the rotor shaft ring.
  • For SM and SMBW 2000 series Listed under the Pentair SM and SMBW 2000 series backwash valve parts.
  • Filter valve part Carried as a filter valve component, not a filter tank or pump part.
  • Small part, real leak A hardened rotor shaft ring is a common source of a slow weep at the valve.
  • Worth doing on a rebuild Cheap enough to replace whenever the valve is apart for anything else.
Full description and specifications ↓

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Product details

The Purex JV18 is the rotor shaft O-ring for the Pentair SM and SMBW 2000 series backwash valves. Purex is now part of Pentair, and the part number carried over unchanged.

What it seals

It sits around the rotor shaft inside the valve. Like any O-ring in a moving joint, it hardens and takes a set with age and chemical exposure, and when it does the valve starts to weep at the shaft under pressure.

Before you order

A backwash valve carries several O-rings of broadly similar size, so check yours against the parts diagram for the valve rather than by eye. If the valve is coming apart anyway, the rest of the seals in it are the same age and cost the same labor, and doing them together saves opening the valve twice.

Specifications
Brand Purex (Pentair)
Manufacturer part number JV18
UPC 788379738617
Type Rotor shaft O-ring
Part type Filter Valves Part
Fits Pentair SM and SMBW 2000 Series backwash valves
Shipping weight 0.02 lb
Ships Parcel

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Questions and answers

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

Which valves does this ring belong to?
It is carried under the Pentair SM and SMBW 2000 series backwash valve parts, as part number JV18.
Where does it sit in the valve?
It is the seal around the rotor shaft. Compare it against your own parts diagram before ordering, since a valve holds several O-rings of similar size.
Should I replace anything else at the same time?
If the valve is already apart, the other seals in it are the same age and the same labor. Working through the diagram once is cheaper than opening it twice.
Is it a genuine part?
Yes. It is the Purex, now Pentair, part JV18.
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