First of all - Hi every one.

I have a hotpoint washer which reports an error after 15 minutes. E11 check water supply.

I have looked into this error and it means there is no (not enough) hot water after 15 minutes.

I do not know if it is coincidental but I fitted a (replacement) new shower and installed an isolating stop valve. There is a pipe (cold) that runs up the side of the hot water tank and into the top of the tank, branched off this half way down is the pipe to the shower with a few elbow joints and the isolating valve - this valve can't affect the hot water tank can it?

The cold water pressure seems perfect through out the house. The hot water pressure has never been anywhere near as strong. It appears to be the same as always BUT in the kitchen the hot water pipe goes up to the sink and the pressure is fine, this pipe branches off to the hot supply of the washer. The stop tap is turned all the way on and when I hold the pipe over a bucket the water is only trickling out.

Would it make sense to cut the pipe and replace including the stop tap?

There's a good chance your problem is actually located at the washer's end of the deal. Try shutting off the valves that the washer supply hoses are connected to, then disconnect the hose ends from the washer. Put the ends of the hoses into a sink or large bucket and experiment a little: when the valves are turned on, does the cold water indeed come out stronger than the hot water? If not, then your problem is obviously with the washer, not the piping. If yes, then the problem may be elsewhere after all.

Let me know what happens.
Moishe

Moshie's correct. Have you checked the screens on the hoses? Unscrew the hoses from the shut off valves and ckeck and clear the screens. If the screens are clear and there's still a trickle get back to me with all the details you have. I don't think the shut off valve for the shower has anything to do with your problem. Regards, Tom

Hi, I took off the hot and cold pipes leading to the washer and (roughly) connected them to the kitchen sink cold water tap and the flow was the same on both.

I then put a basin under the hot water pipe that supplies the washer and turned the valve so that water should have spurted out. The water didn't even lift higher than 1 cm in the air and therefore it was just a very small trickle. Blockage in pipe / stop valve between washer and t section of hot water pipe?

The next step would be to shut the water off at the house stop and take the washer valve off. Hold a bucket under the open pipe and have someone turn the water on for a second. Getting a strong stream now? This will be solved be the process of elimination so start workingt backward. Regards, Tom