Rangemaster tap leaks from opposite side

[a_q]

Hi I have a rangemaster kitchen tap, with a curved spout and quarter turn valves.

It's about 3 years old.

With both valves off there is no leak.

When one valve only is full on, water leaks from the top of the opposite valve stem. It's like the water has traveled to the opposite side, above the cartridge, and then leaks out.

Any ideas? Should there be a non-return valve in the middle somewhere (under where the spout swivels around??)

Just to add a few more details it's a

Rangemaster Belfast Bridge Chrome Kitchen Sink Mixer Tap TBL1CM

Thanks.

 

[Burger]

Could be a crack in ceramic disc?

 

[a_q]

The ceramic disc where - do you mean in one of the valves or cartridges?

Note that it doesn't leak when the valves are off. If also doesn't leak from the valve that in ON, but from the opposite side.

 

[Welder]

Hi I have a rangemaster kitchen tap, with a curved spout and quarter turn valves.

It's about 3 years old.

With both valves off there is no leak.

When one valve only is full on, water leaks from the top of the opposite valve stem. It's like the water has traveled to the opposite side, above the cartridge, and then leaks out.

Any ideas? Should there be a non-return valve in the middle somewhere (under where the spout swivels around??)

Just to add a few more details it's a

Rangemaster Belfast Bridge Chrome Kitchen Sink Mixer Tap TBL1CM

Thanks.

Replace both cartridges. There is nothing wrong with the discs. The fault arises as the o-ring(s) on the stems have worn out.

 

[Burger]

Replace both cartridges. There is nothing wrong with the discs. The fault arises as the o-ring(s) on the stems have worn out.

Thanks Dave. I thought it might have been a crack in ceramic, guess not

 

[Welder]

Thanks Dave. I thought it might have been a crack in ceramic, guess not

When a disc cracks, mostly through wear or over tightening,they leak continually

 

[a_q]

Replace both cartridges. There is nothing wrong with the discs. The fault arises as the o-ring(s) on the stems have worn out.

Thanks, but just to confirm your diagnosis, if the o-ring on the stem has worn out, wouldn't it leak from the same side too? (It doesn't).

 

[Welder]

Thanks, but just to confirm your diagnosis, if the o-ring on the stem has worn out, wouldn't it leak from the same side too? (It doesn't).

No. By stem I mean each cartridges spindle (the part the handle attaches to).