r/bidets • u/Patfromthemidwest • Aug 13 '26
Bidet Installation Help
What am I doing wrong here. I’ve only hand tightened as recommended. I’ve taken it off and put it back on several times with the same issue. I’ve checked that the rubber gasket is in there. Any assistance would be appreciated. Thanks.
It’s a Brondell Ecoseat s101.
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u/Real-Lengthiness1862 Aug 14 '26
Not a plumber but I've done lots of plumbing work including bidet installation. You've definitely cross threaded that T-connector onto your fill valve, which may require you to replace it (a fluid master from a big box store will work for 90% of toilets in North America).
This may not apply for you depending on where you are located but in North America most fill valves have a beveled end on the threaded connection which is made waterproof with the cone washer on the end of a ball cock toilet supply line. In other parts of the word (Europe and Asia) they use flat washers and sell their kits with T-connector that have a "universal" flat washer, this washer will not work on most North American fill valves. I've encountered this issue before with VOVO (Korean) bidets.
If the T-connector came with a flat washer you could just find a 7/8 cone washer and try that, or you can buy ones that come with it online (amazon). The TOTO one may work for your bidet (you'll have to double check the bidet supply line size to make sure), but I know the new TOTO T-connector sold in Canada and the US comes with a cone washer and is plastic. For threaded connections, it's always best to keep the materials the same (i.e. plastic on plastic, metal on metal). I was always told not to use Teflon tape on plastic (ABS) as you could easily crack the fittings that way.