Waterway 400-4030 1-1/2 inch union, male pipe thread by female slipWaterway 1-1/2" x 1-1/2" S Union MPT, 400-4030 In stock$1399
Waterway 400-4030 1-1/2 inch union, male pipe thread by female slip
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Waterway 1-1/2" x 1-1/2" S Union MPT, 400-4030

Ask a questionMPN 400-4030
$1399
In stock
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Quick overview

  • Union, not a coupling Unscrew the nut and the equipment comes off the pipe without cutting anything.
  • 1-1/2" male thread Threads into the port on a pump or filter.
  • 1-1/2" female slip The other side takes 1-1/2" PVC pipe on solvent weld.
  • Waterway made The factory Waterway union, part 400-4030.
  • Pump and filter service Put one on each side of the equipment and future service stops meaning a saw and new fittings.
  • Seal the threads properly Use silicone or teflon tape on the male thread, not pipe dope that can attack plastic.
Full description and specifications ↓

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Product details

The Waterway 400-4030 is a 1-1/2" union for pool equipment plumbing: a 1-1/2" male pipe thread on one side and a 1-1/2" female slip socket on the other.

Why unions belong at the equipment

Anything you will one day take off the pad should be plumbed with unions. Put one on each side of the pump and the filter and every future service call is a matter of loosening two nuts by hand. Without them, pulling a pump means cutting pipe, buying couplings, and waiting on glue before the system can run again.

Installing it

The threaded end screws into the port on the pump or filter. Use silicone or teflon tape on that thread and take it up snug rather than hard, since plastic threads split when they are overtightened. The slip side solvent welds onto 1-1/2" PVC pipe. The union nut seals on its own face, so it does not need tape.

Specifications
Brand Waterway
Manufacturer part number 400-4030
UPC 806105081216
Fitting type Union
Size 1-1/2"
Connections 1-1/2" male thread x 1-1/2" female slip
Application Pump and filter union
Thread sealing Use silicone or teflon tape
Shipping weight 0.35 lb
Ships Parcel

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Questions and answers

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

What are the two ends?
One side is a 1-1/2" male pipe thread and the other is a 1-1/2" female slip that takes PVC pipe on solvent weld.
What is it used for?
It is a pump and filter union. Fitted at the equipment, it lets you break the plumbing apart for service by hand instead of cutting the pipe.
How do I seal the threaded side?
Silicone or teflon tape on the male thread. Take it up snug and do not overtighten a plastic thread, since that is what splits fittings.
Does the nut seal without tape?
The union nut seals on its own face, so tape belongs on the male pipe thread that screws into the equipment, not on the union nut.
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