Loosing water from the over flow tank only - 2007 Husqvarna TE 450

Possibly cavitation, air leak, leaking foot valve causing drain back, pump impeller is loose...

the fill valve is not letting water in you either have a float that raises up when water is full so when you flush the float drops down letting water in then when water raises it shuts off i would replace the float fill valve and corky flapper.... here is what you do .... first shut water off where it goes up to the tank....... flush commode to empty as much water from tank....... reach up under tank there is a plastic coupling that connects the water supply line to the bottom of the toilet tank...put a small pan under the shut off valve that goes to the toilet some water is going to drain from the tank when you take the coupling loose..... turn the coupling counter clockwise ( use a channel lock adjustable wrench to loosten then had turn) once this is loose you can pull the riser tube away from the tank...... now there is a plastic nut that screws the shaft to the bottom of the tank loosten with channel lock then remove with hand by turning counter clock wise ( you will get a bunch of water flowing down to the pan) remove the entire fill valve , replace with a fluidmaster fill valve ( about 8 bucks from big box store when you take the new fill valve out of the box there is a neopreme seal you must put on the new threaded shaft ( it has an inner ring you may have to punch out) once you put this on you can insert the entire shaft down through the hole in tank then secure with thin nut provided tighten but do not overtighten then put coupling back on,,,,,put the over flow tube on the tit of the fill valve and stick down into over flow ok thats done when you go to big box store purchas a 5 buck corky flapper (red caus it can handle chlorine water better) remove the old one at bottom of tank( just two clips to remove and chain attached to flush lever...install new one be shure chain does not have a lot of slack so it does not fall under flapper seal when you flush......OK YOU ARE DONE TURN WATER ON WATCH TANK FILL LOOK FOR LEAKS TAKE A TOWEL AND DRY ALL AREAS THEN TAKE YOUR HAND AND FEEL FOR LEAKS UNDER TANK AND DOWN TO SHUT OFF VALVE .....CONGRATS YOU DID IT!

It is quite common to loose air pressure in the RO over time. At times the tank will be full of water but will not have enough air pressure to push water out. Take the tank of drain as much water as possible, for 3 gallon tank bring pressure in tank to 7psi, for 10 gallon tank pressure should be 10psi.
RJ

It sounds like one of the internal tubes is loose or has a leak. You'll need to open up the black plate (the plate where you place the water tank on top of). Inside there, you'll be able to see all the tubes and hopefully track down which one is leaking or loose. Some of the tubes have clips to hold them in place. Perhaps one of those came loose.

Bypass valve incorrectly set
obstruction or dirty tank
plugged line - lime or other! does cold flow into tank ok?
Tank is split water going somewhere you can't see - this should be obvious.

There is not really anything to obstruct the flow normally so there
would have to be an obstruction somewhere. Lime, junk, garbage etc build up .
On my coach I have lots of pressure on the cold side so hot would have to have the same unless there is an obstruction into or out of the tank. If in the bypass position you have sufficient flow than the lines are ok and the problem or obstruction is in the tank itself. Drain the tank, leave the bottom plug out, open up the pressure relief valve. Turn on the water and see if you get a lot of water draining from the drain hole on the tank. There should be a lot of water coming out of the drain hole. If so that tells you that your getting sufficient flow into the hot water tank. If so your problem is the water getting out of the tank. Like a clogged return line or an obstruction from the water tank to the faucet. A dirty scale lined tank can do a number on tank water flow. Also check to see if the water is going somewhere else, your tank could be split and you just can't see where the water is going!

replace the cap i suspect this is the problem,this is an air tight system .adrian;;;

The pipe you call over flow. This would be the P/R valve and is set to relieve pressure in system. The first thing that needs to be checked - the expansion tank two types of tanks one would be what is know as a extrol tank, Most likey just hanging off pipe, it has air pressure on one side of rubber dia. and boiler water on other. The 2nd type is just a tank at ceiling height (most of the time). You would see a hose bib off the one end. Tank holds some water but must have air for boiler water to push into as it is heated. If you have the first tank it should be replaced. The 2nd type needs to be drained of all water. Shut off feed line to tank hook up short hose and drain into a bucket. if water stops you must break the vacuum raise hose above tank air should go into tank. repete draining till all water is out of tank. Some tanks have a way to open a valve to let air in as you drain if so use it. When all water is out of tank valve off everything (no air should leave tank) Open back up to system now you should have aplace for the water to expained to.

A simple thing to check is make sure the round seal is on the bottom of the tank, it needs to be on the tank not sitting loose in then hole that the tank valve goes into. Could be a problem with the flow indictor cap leaking air. Is the top and the base tight together in the back, sometimes the plastic breaks loose and the top will rise enough that it raises the tank so water won't flow. Your pump may be bad.

Which tank is loosing water?
Number 1. Make sure all curtains inside are in place.Curtains help keep the water in the proper tank. For example, curtains are missing between prewash tank and wash tank, the wash tank water could be significantly splashing into prewash tank and out the p.w. tank overflow. Are you ruling out the drain because you replaced o-rings? Look at the floor drain as machine is running. Do you see a large flow of water going down drain? There is a drain heigth adjustment on the drain lift. Mabe the drain stopper is not dropping far enough.
Mike

To check the water lines you have to take the top housing off, you may have a water line that came loose. It it is leaking from just under the water tank, there may be a line unhooked there. Check the seal that the tank sits on, it may have to replaced, the other is the diaphram that the tank sits on isn't closing alowing the water to keep flowing.