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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...

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.. :(

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...

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...

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...