Andy VH
New Member
Yes it can be done, with a little bit of fabrication, careful fitting and adjustment. When I bought my house in 2002 it still had the early 70s Kohler Rochelle toilet in the main bathroom. But I really liked the style. However, when it started to fail, I found the replacement cost of the odd Kohler fill/flush setup ridiculous. I opted for a Cesco replacement. That too, only worked for about six years. Then I found a Plumbpack product at Menards that actually fit the Rochelle, which also included a flush valve/overflow tube assembly, all for $10. It required some faith in modern 100% silicon adhesives, as I bonded the flush valve body into the bottom of the tank, as the flush valve body was not made for a one piece tank. Everything worked fine and was serviceable with common internal parts. But the flush valve flapper was always finicky, as it became again this year. Constantly going through cycles of working ok and then seeping/hissing again. Even fiddling with various flappers into the flush valve body got to be a hassle trying to make it work with the original Kohler flush handle and arm. It worked ok if you held the flush handle down until half the tank flowed into the bowl. But many incomplete flushes got the "look" from my wife, not too mention the evidence left in the bowl!
So I tanked all the old tech and went fully 2020 on the 70s vintage Rochelle. I installed a full Danco system, the Hydroclean 660 fill valve and Hydrostop flush valve. SWEET!! Quiet, consistent operation, adjustable water level, even the flush handle action feel modern, not jiggly. The key to the entire setup is to adapt the standard 1/2" tank connection to the Kohler tank with the oversize hole. Long ago I made a spacer/gasket set that sized the tank bottom hole to adapt any standard current fill valve. Next I found out that the modern fill valves (Danco, Fluidmaster, Korky, others) are height adjustable down to a level that fits in the low profile of the Rochelle body. The Hydroclean 660 also has a port near the bottom that allows a 3/8" tubing run from the base to the rim flush on the Rochelle, so that made my choice for Danco. For the rim flush option I made a combination of tubing to size the port down to the 3/8" tube OD, and used the "tank bottom cleaning" function of the Hydroclean 660 the rim flush option for the Rochelle, and it works.
The rest is simply packaging, meaning positioning the Hydroclean 660 and Hydrostop in a manner to fit all snug together in the tank area. I had to pry the flush valve off the tank bottom to reposition it, and the silicon adhesive I had applied back in 2006 has holding VERY firm. It took persistent care to get the flush valve out. I cleaned up the flange area, reapplied fresh 100% silicon adhesive and set the flush valve position to suit all the new components going in. The rest was just following the Danco instructions. I have a thoroughly modern 2020 Kohler Rochelle toilet, adjustable water and flush levels.
So I tanked all the old tech and went fully 2020 on the 70s vintage Rochelle. I installed a full Danco system, the Hydroclean 660 fill valve and Hydrostop flush valve. SWEET!! Quiet, consistent operation, adjustable water level, even the flush handle action feel modern, not jiggly. The key to the entire setup is to adapt the standard 1/2" tank connection to the Kohler tank with the oversize hole. Long ago I made a spacer/gasket set that sized the tank bottom hole to adapt any standard current fill valve. Next I found out that the modern fill valves (Danco, Fluidmaster, Korky, others) are height adjustable down to a level that fits in the low profile of the Rochelle body. The Hydroclean 660 also has a port near the bottom that allows a 3/8" tubing run from the base to the rim flush on the Rochelle, so that made my choice for Danco. For the rim flush option I made a combination of tubing to size the port down to the 3/8" tube OD, and used the "tank bottom cleaning" function of the Hydroclean 660 the rim flush option for the Rochelle, and it works.
The rest is simply packaging, meaning positioning the Hydroclean 660 and Hydrostop in a manner to fit all snug together in the tank area. I had to pry the flush valve off the tank bottom to reposition it, and the silicon adhesive I had applied back in 2006 has holding VERY firm. It took persistent care to get the flush valve out. I cleaned up the flange area, reapplied fresh 100% silicon adhesive and set the flush valve position to suit all the new components going in. The rest was just following the Danco instructions. I have a thoroughly modern 2020 Kohler Rochelle toilet, adjustable water and flush levels.
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