Need education

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iceflow

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Jul 25, 2010
201
Folks,
I'm looking for some education here.
I have a couple of problems in the pump motor fascia to multiport valve plumbing. Under that grey smear (Purple) of JB Weld in the pic is a hairline crack…….not leaking at the moment. Also, self inflicted, the pump motor fascia leaks (Beige Arrow) because I think I tightened the pipe down too much when I replaced the fascia years ago and I’ve put a split in the fascia seam.
My questions are:
  • Is that really a screw thread into the MPort valve? (Orange arrow) If it’s glued in there I’m in trouble right out the gate.
  • I’ve got no slack in this piping see Purple circle what I had to join in when I cut the pipe to replace Pump fascia. If I can’t pull the entire assembly out what are my options? If I can unscrew the pipe at the MPort connection then I can pull the whole lot out and replace it.
  • I would like to know if there are any safe connection methods rather than the traditional Pipe Glue. Are there manual pipe connectors and do they hold? I don’t need Noah’s flood part 2.


Thanks!
 

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Ice, well, good new & "other" news I think. Yes, the fitting is screwed into the MPV, but the PVC slipped behind it is glued. Since there are no unions to unscrew .... I think you're kind of stuck. To re-do the plumbing you almost have to just cut it out and re-do it. If you cut the inlet pipe to the MPV directly behind the screw-in adapter, then just above where the other end screws into the pump outlet (with gate valve), I think you can take that whole s-shaped PVC pattern out to use as an example.

But this may also be a good time to just get a union for the MPV inlet and the pump outlet (gate valve) so that in the future you can separate the two easily. You might have to re-think the PVC route just a bit, but it's an option. Aside from that, it's the basic saying of "measure twice/cut once" technique using regular PVC primer and glue. You can dry fit before gluing to check your work. Have some extra PVC and fitting just in case and take your time. Oh, and you may want some Teflon tape and/or plumbers dope for the threads going back into the MPV inlet and the pump outlet.
 
Texas Splash said:
Ice, well, good new & "other" news I think. Yes, the fitting is screwed into the MPV, but the PVC slipped behind it is glued. Since there are no unions to unscrew .... I think you're kind of stuck. To re-do the plumbing you almost have to just cut it out and re-do it. If you cut the inlet pipe to the MPV directly behind the screw-in adapter, then just above where the other end screws into the pump outlet (with gate valve), I think you can take that whole s-shaped PVC pattern out to use as an example.

But this may also be a good time to just get a union for the MPV inlet and the pump outlet (gate valve) so that in the future you can separate the two easily. You might have to re-think the PVC route just a bit, but it's an option. Aside from that, it's the basic saying of "measure twice/cut once" technique using regular PVC primer and glue. You can dry fit before gluing to check your work. Have some extra PVC and fitting just in case and take your time. Oh, and you may want some Teflon tape and/or plumbers dope for the threads going back into the MPV inlet and the pump outlet.
Click to expand...
Got it thanks!. So if I'm following you correctly I should be able to unscrew the fitting from the MPV? That's a relief, I don't mind cutting the piping and getting a new screw in fitting, that's fine at least I can get the old assembly out. I will proceed with caution and give it a liberal, several day soaking in PB Blaster before I have a go at it.
Also...could you give me some info on 'Union' and easy separation? Are they available from Home Depot etc?

Thanks!
 
Unions will look something like this:
full


You can find them at several places. You can try the big box store locally, some local pool supply stores, or even online of course. For the union coming out of the pump, they have hi-temp unions designed to hold-up better to teh heat in case you're interested.
Hopefully the adapter screwed into the MPV wasn't cemented or anything. Usually they just have some threaded tape and/or plumber's dope. I would think you should be able to see the threads sticking out just a little no?

To be sure, what's the model MVP you have? Do you seen any ID info? Looking at some Pentair MPVs, they make both threaded and socketed ports. :(
 
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Got it thanks!.
The P/N is 261152. It also looks to me to be threaded into the inlet port. I just hope they didn't glue the threads. Not sure why they would do that. OK, I will bite the bullet and pull the piping off and hope to unscrew the connection to the MPV. I will also get some of the piping union connectors for the new piping so that I can dismantle it easier if I ever need to. Thanks for your help, much appreciated!!
 

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