Rex Valve Flushometer (Repair)

[uptown25]

Recently the water-main in my neighborhood was replaced. I think sediment got into our pipes and have damaged the diaphragms in our toilets.

What we have are DELANY REX VALVES
Same as; simply search this page for "Rex" and you'll find the diagram.
http://crestgood.com/catalog/Ch%2008%20complete.pdf

The issue:
Two of our toilets continuously flush (water runs) when the lever is pulled. I've turned off the screw valves on the fixtures (these are tankless rex valves if you've seen the diagram). I've read all I need to do is replace the diaphragm, Simply getting a repair kit from the hardware store etc.

My question to you guys:
Is this all I need to do, and how is this done properly? Detailed is what I'm looking for, detailed enough as to even where the brass pinhole part should be, adjacent to the lever, exactly where?

Any, any help at all would be awesome! Also I'm not quite sure how to know what gallon type I need to get, I remember 3.5 from the last plumber that came in to repair but unsure. How would I be able to gauge that? THANK YOU THANK YOU THANK YOU!!!

[uptown25]

Update-

I replaced the diaphragm on one of the toilets. The water doesn't continuously run now, but now it doesn't get a full flush. I got a 3.5 replacement kit, could it be it's the wrong one and that's why the flush is weak?

I'm not going to try the other one, instead wait for a response here or from my plummer friend.

[johnjh2o]

Are you sure you got a 3.5 gallon diaphragm? If your toilets are 1.6 with a 3.5 the toilet would flush twice. If your toilets are3.5 with a 3.5 they would flush normal. It sounds like you have 3.5 toilets and you used 1.6 diaphragm this would cause them to flush either slow or not at all.

John

[uptown25]

thanks for the reply

the part number is r107-3a7 3.5 dia assem

maybe they slipped me a 1.6 inside and re-tagged? I did purchase two of them, I didn't install the other one since I was unsure if I got the right one.

The watermain on my block was just upgraded, maybe there is air in the pipes in my house causing the lower pressure? When I was test flushing it, there was a lot of hissing in the bowl, like bubbles being let out.

Maybe it will fix itself, though if this is the correct diagnosis what's some ways I can remove the bubbles from my piping?

[uptown25]

Confirmed the last diaphragm was a 3.5 installed by the last plumber from the receipt.

I'm giving up and called the plumber today..

[uptown25]

Update, the plumber wouldn't replace a new diaphragm so I simply did it myself. He had the nerve to tell me all he could do is replace it with a new flushometer. Repair cost was about $12 for two new diaphragms, and installation was free. The guy was also asking for $350 per installation...
$12>$350 simple.

I was having issues with the installation, that's why I was giving up. I tried again, and installed it the right way. All my rex valve toilets work better than ever now, good to be handy and not have to cough up at least $60 for each plumbing visit, saving some cash.

So of all the issues I thought it was, replacing the diaphragms did the trick, installing it properly was my issue since I'm such a novice. Learned big time from this experience, now I'll be called upon next time the diaphragms need to be replaced.

[phishfood]

Good for you, & thanks for the update.