multiport clamp cracked

I noticed my multiport screw on clamp is cracked this connects the multiport to the filter....looks like its all PVC glued and not easy to replace...any input on how to replace this would be appreciated

There is 2 sets of retaining nuts that connect the muti port valve body to the filter. The one closer to the filter is called a bulkhead retaining nut. This nut (union half) is larger and secures the internal components to the exterior filter body. The other retaining nut, aka union half, connects the multi port body to the filter plumbing externally.
If you are refering to the larger bulkhead nut, you can just find a replacement part. If you have a broken nut that is fixed onto the multi port body, you are out of luck and most likely need to replace the entire body for that single nut.
Sounds crazy? We'll I had this problem occur this morning and took in the broken nut to a well known pool supply store here. The plumbing is fixed into the body and it's unknown if you will be able to cut the pipe and insert the nut and then re-plumb using a 2" coupling. Not sure if this would work. Like you, I would like to get some insight also.

Welcome to the Forum, both of you!

If it's a side mount multi that has the 1/2 union threaded nut broken - the best option is to replace the multi :(

You might be able to 'band-aid' it with a stainless steel clamp, but that would be a temporary fix, at best.

Pics would certainly help for this question :)

Thanks for the responses....I used a clamp and was able to stop the leak....not sure how long this will work...but for now I'm ok

For the future, your life will be much easier if you cut into the pipes leading to the valve and glue in quick-connects instead. I have QCs all over my system and it's a snap to disconnect stuff. Where it's ideal to have a ball valve, I get the kind of ball valve that has the QC built in, so I get 2 for the price of one. So:
At the bottom of my skimmer is a BV/QC. I pop it off and leave the valve open for the winter.
At the low drain is a BV/QC. I plug the drain, and pop the valve off--and it goes in the basement.
At the return is a QC. I plug the return and it comes right off.
On my Multivalve: I have a QC leading from the pump, another to the return, and a third to my backwash drain
On my pump: I have a QC leading to the filter, and a BV/QC from the drain and skimmer. When I need to clean the strain, I shut the BV, and put the filter on CLOSED. Easy!

QCs are about $10-$15 a pop. BVs range in price. You DO have to maintain the O-rings. I clean and lube them (with silicone/vinyl lube,safe for rubber) and seal each on in a zip-lock for the winter with the air squeezed out. (remember to mark the bags). In the spring they just pop back in.

Somewhere around there's got to be a picture of my old setup of my pump with QCs. I've since upgraded this.
http://home.earthlink.net/~dashmanc/pool/Filter05.jpg

I've changed it and moved it as there's now a deck where the pump is, but the connection between the pump and filter is the same.

Carl

Thanks for the info, i need to move the filter (next season) anyway so it will be the perfect time to do this

I'm very glad that the clamp is working for you! It should get you through the season (I've had some that have worked for 2+ years, but others that have failed within a couple months - YMMV :) )

When you go to replumb, post a pic and we'll be able to give you better advice.