The Duo Flush toilet closes right after the lever is released, what do I do now?
You need to make sure that half of the OVAL opening of the Dual Duo Flush toilet is at least submerged in water. Ideally, it should be completely submerged, but half is the bare minimum. If it is less than half than Duo Flush will not function properly and should not be used.
Alternatively, if it is at least half submerged, then Duo Flush needs to be correctly calibrated. To calibrate the Duo Flush, set both dials to MAX. Now perform a half flush by completely lifting the lever. Keep in mind that if you do lift the lever completely, then the Duo Flush will not work as intended. Note the water level in the bowl, if it is completely empty, then lower the reading on the dial and repeat the process until you get an acceptable level of water level in the bowl after the flush. The lowest possible reading on the Green dial should be used. Once half flush has been calibrated, you need to calibrate the full flush, which uses the Blue dial, and will most likely be calibrated at about 2-3 readings higher than the Green dial.
The Duo Flush toilet is correctly calibrated, but the bowl is not clearing out. What do I do now?
To remedy this issue you need to start by making sure that the water level is at or above the water line. If a water line has not been set, then you need to set one. Start by setting the water a quarter to half an inch lower than the top of the overflow pipe. The proper water line will only be set if the height of the PerforMAX valve is set three inches above the overflow pipe and a higher water level is advised for best results.
Now make sure that the water level in the bowl is at its highest point. It seems to be low, once the tank has been completely refilled then you need to make sure if the refill hose is supplying water to the overflow pipe or not. If you are using a PreforMAX valve with a refill module (discontinued in the latest edition), then set the roller clamp on the back of the hose to permit maximum flow. Now increase the setting on the Green dial by one, and check again. If it’s still low, then repeat the steps until you get an acceptable water level.
If, however, you are not using PreforMAX valve then make sure that the refill tubing from the fill valve is directly connected to the overflow pipe.
Now you need to calibrate the half and full flush settings. Refer to “The Duo Flush toilet closes right after the lever is released, what I do now?”
If all else fails, then check the make of the flush you are using. It is most likely pre-1994, which requires all of the water to be flushed out. You should set the water level as high as possible to remedy the issue.
I am facing Ghost Flushing (fill valve turning on and off randomly), what do I do now?
There is a leak in your setup. Water is leaking into the bowl. Use the shut off valve to cut the water supply, making sure that the tank is full when you cut off the supply. Let all the water drain until the water level comes to a halt. Now you have to inspect for a leak. Most likely the leak is occurring at one of the following points: flush valve seat, the Duo Flush piston seal, Angle Seat Adapter’s sealant ring, original flush valve gasket (found at the base of the flush valve drain seat). If the leak isn’t in any of these locations, then check for cracks from wear and tear of the overflow pipe.
To check the Duo Flush valve, remove from the valve seat by slowly moving the Duo Flush canister from side to side and then pulling up. Check for wear and tear, and if the seal of the valve looks compromised, then contact Fluid master’s technical service for a replacement.
To check the original flush valve, run your hand over its black seal. If you get black residue on your hands, then replace the valve. You should replace it with Fluid master’s 507 flush valve.
To check for a leak from the Angled Seat Adapter, you need to pull the adapter straight up until it becomes loose and fee. Then turn it upside down and check the gray colored sealant ring for a clear impression. If any of the ports do not have a clear impression, then you need to reshape the putty where it has been damaged.
The overflow pipe needs to be checked for obvious cracks if all else are fine.
If the overflow pipe has no cracks or leaks then it is likely that water is leaking from the refill pipe. The refill pipe should be connected to the overflow pipe and should go up to a height higher than the water level in tank. If it does not then make sure that it does. If you are missing a refill clip, then contact Fluid master’s technical services for a replacement