mystreba
New Member
Break it down...
I recently installed a WC/Urinal combo in my bath. Fixtures, plumbing and flushometers are all brand new.
I ran a dedicated 1" supply line directly from my 86-Gal, 40/60 pressure tank to feed these two fixtures. A reducing sleeve in the 1" tee right between the two fixtures sends 3/4" supply over to the urinal. All supply lines are held very securely to the framing with clamps. Supply lines are CPVC all the way to the flushometers.
WC has a Sloan 136 1.5' top spud flushometer (yes, it's the squat toilet model but the tech at Sloan informed me it was the same as the 110 model except the vacuum breaker tube is longer and just required cutting to size). Urinal has a Kohler K-13519 3/4" top spud flushometer.
Kohler urinal flushometer works great.
When I installed and adjusted the Sloan WC flushometer, it worked well for 3-4 flushes. Then the supply line began hammering violently behind the wall. I closed off the stop valve, pulled the piston and re-installed it. Once again, after initial adjustment the flushometer worked well for 3-4 flushes, then the supply line began hammering violently behind the wall. I verified that the piston is correctly sized for the 1.6 GPF Kohler WC. The troubleshooting guide in the installation instructions says "the size of the orifice in the 'bypass' is critical for proper metering of water". Unfortunately they don't bother to indicate what/where said "bypass" is.
Sometimes the hammering settles into a rhythmic knocking - you can hear the vacuum trying to seal. The knocking won't stop until I also flush the urinal.
I've adjusted until I'm blue in the face - any thoughts on how to stop the hammering?
many thanks
I recently installed a WC/Urinal combo in my bath. Fixtures, plumbing and flushometers are all brand new.
I ran a dedicated 1" supply line directly from my 86-Gal, 40/60 pressure tank to feed these two fixtures. A reducing sleeve in the 1" tee right between the two fixtures sends 3/4" supply over to the urinal. All supply lines are held very securely to the framing with clamps. Supply lines are CPVC all the way to the flushometers.
WC has a Sloan 136 1.5' top spud flushometer (yes, it's the squat toilet model but the tech at Sloan informed me it was the same as the 110 model except the vacuum breaker tube is longer and just required cutting to size). Urinal has a Kohler K-13519 3/4" top spud flushometer.
Kohler urinal flushometer works great.
When I installed and adjusted the Sloan WC flushometer, it worked well for 3-4 flushes. Then the supply line began hammering violently behind the wall. I closed off the stop valve, pulled the piston and re-installed it. Once again, after initial adjustment the flushometer worked well for 3-4 flushes, then the supply line began hammering violently behind the wall. I verified that the piston is correctly sized for the 1.6 GPF Kohler WC. The troubleshooting guide in the installation instructions says "the size of the orifice in the 'bypass' is critical for proper metering of water". Unfortunately they don't bother to indicate what/where said "bypass" is.
Sometimes the hammering settles into a rhythmic knocking - you can hear the vacuum trying to seal. The knocking won't stop until I also flush the urinal.
I've adjusted until I'm blue in the face - any thoughts on how to stop the hammering?
many thanks