How to Fix a Dual Flush Toilet Tank


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


How A Dual Flush Toilet Works

Water ridge dual flush 2 by Costco faces a general problem of leakage and the valve getting stuck during the flushing process. This issue is observed specifically with the full flush button. If you were to contact Water Ridge regarding this issue, they would send you a replacement flush mechanism. This is well and good until the new one shows the same problem again.

What you need is a permanent solution, not a temporary replacement. The problem is not with a particular unit but lies with the manufacturing process used, which lacks the finishing process for the particular axle parts.

The lack of finishing process during the manufacture leaves casting lines on the axle, which get stuck due to increased friction in those regions. This happens because casting is not a precision manufacturing process and leaves rough edges of the cast part.

The simplest solution which most of you must have figured out is to wiggle the flush buttons because it applies force on the axle and releases it from the position it is stuck in.

To find out the best solution, we did a Root Cause Analysis, which is simply a fancy way of saying that we took apart the flush to find out the problem, and we did that to try to figure out how to solve the problem.

The problem is when you pull the flush button; it acts on a lever which pivots to pull the valve assembly. A latch mechanism holds the assembly until water drains into the bowl. The problem occurs here, when the latch lets go of the valve, the valve does not drop as it should and instead it remains stuck. This is where the cast marks on the axle get stuck. All that needs to be done is to finish or remove these cast marks using sanding.

To get to the required part, that needs sanding, you need to disassemble the flush. You have to start by opening the assembly. The flush buttons need to be aligned with the float mechanism which aligns the tabs on the button mechanism with a slot on the mating surface. This step is necessary because if you carry on without doing this step right the tabs will break when you remove the button assembly and when it  is time to put everything back together, it won’t fit. You can now remove the button assembly using a screwdriver. Now, disengage the lever from the valve assembly by prying it using a screwdriver. Using a sand paper, which you can get at the local hardware store, polish off the casting marks. That is it! Now you just need to put everything back together (do everything you did to disassemble, reverse) and you are done.

How I Chose the Best Mattress for Back Pain


Choosing a Reliable Mattress for Back Pain Is Not Hard


When we hear the word mattress, the image of a bed comes into our mind. That image is of course different for different people. People spend a lot of time and money to search for the bed frame, but when it comes to the actual mattress, they are not too keen on finding an appropriate one. In actuality a mattress plays a much important role than the one it is credited to.

Back pains are pretty common these days, even among the young generations.  A lot of research has been carried out on this issue, but the results are still inconclusive. The doctors still have not figured out a way to exactly pinpoint the cause of these pains. Sometimes the underlying cause is the use of inappropriate mattress, but we blow it off by blaming a medical disease.

A human body is not stiff. It just isn’t made that way and there are curves, especially in the spinal region. This is the region with the greatest number of pressure points and a wrongly selected mattress can aggravate these pressure points and present serious problems to the user.

Just as different people have different bodies, the mattresses come in different shapes and sizes. It is not necessary that a mattress suited to one person should be suitable for a different person. Some people prefer firm mattresses while on the other hand, some people like to sleep on soft mattresses rather than firm ones.

These are some of the criteria involved in selecting a mattress. But in truth the Best Mattress is the one which suits the user personally. This is the reason why it is advised to personally test the mattress before buying it.

When you plan to buy a mattress, make sure you spent adequate amount of time and energy to find the one best suited to you. It is preferable to sleep on it at least once before buying it, but if you are somehow unable to do that, make sure that you lie down on it at least once to make sure that it is completely comfortable.

Hello Handymen

I’m Joseph Herman and I’m an experienced handymen. I want to share some secrets with other hadymen all over the country and basically this is why I started this blog. I liked getting my hands dirty ever since I could remember and I’ve managed to pick up a few tricks along the way.


Till my next post, all the best! 😉