Waterway 400-5090 self-aligning union, 2 inch slipWaterway Self-Aligning Union, 2 Inch Slip, 400-5090 In stock$1699
Waterway 400-5090 self-aligning union, 2 inch slip
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Waterway Self-Aligning Union, 2 Inch Slip, 400-5090

Ask a questionMPN 400-5090
$1699
In stock
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Quick overview

  • Two inch slip Sized 2 inch with a slip connection for solvent welded PVC pipe.
  • Self-aligning The design pulls the two halves into line as the nut is drawn up.
  • Serviceable joint A union lets you break the plumbing at this point instead of cutting pipe when equipment comes out.
  • Waterway part 400-5090 The genuine Waterway union, not a generic substitute.
  • Pool and spa plumbing Used in the same runs as pumps, filters and heaters.
  • Hand tighten Unions are designed to seal by hand pressure on the nut, so no wrenching is needed.
Full description and specifications ↓

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Product details

The Waterway 400-5090 is a 2 inch self-aligning union with a slip connection, used through pool and spa plumbing wherever a joint needs to come apart again.

Why a union earns its place

Solvent welded PVC is permanent. Put a union either side of a pump, filter or heater and that equipment can be pulled for service or replacement by loosening two nuts, instead of cutting the pipe and rebuilding the run every time. On a system that gets winterized or serviced regularly, that pays for itself quickly.

Fitting notes

The self-aligning design draws the two halves square as the nut comes up, which helps the seal seat evenly. Tighten by hand only. Union nuts seal on hand pressure, and reaching for a wrench is the usual cause of a cracked nut or a distorted seal.

Specifications
Brand Waterway
Manufacturer part number 400-5090
UPC 806105081810
Fitting type Union
Size 2 inch
Connection Slip
Feature Self-aligning
Shipping weight 0.45 lb
Ships Parcel

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Questions and answers

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

What size is this union?
2 inch, with a slip connection.
What does self-aligning mean?
The two halves draw themselves into line as you tighten the union nut, so the joint seats squarely without you having to fight the pipe into position.
Why fit a union here?
A union gives you a joint you can open. When the pump, filter or heater has to come out, you undo the union nut instead of sawing through glued pipe.
Should I use a wrench on the nut?
No. Union nuts are meant to be tightened by hand against the seal. Over-tightening with a tool is what cracks them.
Ask your own question