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Spa & Hot Tub Plumbing & Jets

Broken Pump Union Nut

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Broken Pump Union Nut

Postby jeffz » Wed Sep 28, 2005 11:23 am

For those of you who have had a pump union nut break, don't despair there may be an easy fix. We have "Split Nuts" that allow repairs without cutting the fitting off, they are available in 1.5"and 2". It will work on Aqua-Flo, Waterway & Vico pumps, and other standard union threads. This part will not work on Hayward pumps or Jacuzzi pumps.

Split Nuts
Jeff

Servicing spas and hot-tubs can be DANGEROUS! If you do not know what you are doing, then please, do not attempt to use the information contained in this message, call a Spa Service Company to service your spa!
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Re: Broken Pump Union Nut

Postby danarn17 » Tue Nov 25, 2008 8:21 pm

Could you post installation instructions, does this screw like the regular nut or do you place on the end unit and then screw it together?
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Re: Broken Pump Union Nut

Postby Tweedledum » Thu Nov 27, 2008 11:07 pm

Screw it together around the plumbing, then thread it onto the union
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Re: Broken Pump Union Nut

Postby djsn1 » Sat Mar 21, 2009 11:41 pm

I have two union Pump nuts on each end of my heater. They are as tight at I can get them but they leak. Is there any kind of gasket or something I can use on these to seal them up. I have taken them off a couple of times but no luck to get rid of the leaks.
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Re: Broken Pump Union Nut

Postby John McLaughlin » Mon Mar 23, 2009 1:39 pm

Have you tried using any plumbers tape? Just a thought i guess.
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Re: Broken Pump Union Nut

Postby Wakey » Mon Jul 13, 2009 7:14 am

jeffz, would that nut work on this tub?

I think that is a flow thru tube.

Thanks!
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Re: Broken Pump Union Nut

Postby TTRUBLUE » Mon Jul 13, 2009 5:40 pm

Yes spiltnut union will work for you on a flo thru housing, do not use teflon tape etc, these are all
o-ring fittings, still leaking after tightning as much as you can? Replace the o-ring, I like to use what
we call flat gasket with o-ring embedded.
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Re: Broken Pump Union Nut

Postby Wakey » Mon Jul 13, 2009 7:23 pm

Thanks!
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Re: Broken Pump Union Nut

Postby WayneB » Sat Jan 23, 2010 7:49 pm

There is a split plastic spacer that goes behind the tube flange.New nut will slide over tube flange first and then slip on plastic spacer second.Use rubber gasket to seal the tube and the threaded part together.
Factory Trained Technician.
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Re: Broken Pump Union Nut

Postby HotTubRepairerUK » Tue Feb 23, 2010 8:02 pm

I have had similar problems with split/cracked union nuts on pumps. Because parts supply in the UK is particullarly poor I managed to fabricate something very similar to what you have there. My method is much more 'ghetto' but it works perfectlly well. Simply remove the broken nut, place the split nut around the union fitting, screw it together and screw the union back down onto the pump after fitting a new seal if required.

It's a simple way of repairing what can be an awkward problem especially if you have to replace several fittings in order to be able to glue a new union into place. It saves the customer some money and keeps them happy. :)

For anyone else making this type of repair, don't use PTFE tape, silicone or solvent cement on the broken union nut as in my opinion it's just a temporary bodge that will eventually fail again.
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Re: Broken Pump Union Nut

Postby randy229 » Sun May 02, 2010 1:49 pm

I have a broken union nut for a Hydroquip 26 0039 versa heater. The Internal Dia is 3 1/2 ". Will the split nut work for the Hydroquip ? Also would need split spacer (hard plastic ?) as that shattered as well. If this is a match, what would be the p/n (s).

Thanks
-Randy-
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