Recent content by RobbiS

My expansion valve is rated close to but a bit lower than the TPRV (8 bar vs 10 bar), another reason why I think that's what's passing. Anyhow - sadly the attempt to recharge the air gap was a failure. Couldn't get a drop of water out of the commissioning cock to drain, nor the TPRV (though I...

Thanks for the advice, appreciated. I'll have a go at recharging again as a first step and ask about the valves if no joy there. Am I right in thinking given that the tundish water is never more than lukewarm even when the water out the taps is hot that the likely source of the drip is...

Thanks for the response - it's a 20RD (170 litre).

Hi all, We had someone out to our Oso direct unvented cylinder recently as it was dripping tepid water from tundish when running. He recharged the internal air gap and all was well for a few weeks, but then the same problem reoccurred - tepid drip when heating element running, although the...

Suppose it does sound like a kettle first being turned on, which makes sense the more I think about it as suppose the heater is just a giant kettle that (hopefully) doesn't boil. Maybe I just never noticed it before as I wasn't really paying attention to the heater until now.

Yes, sorry. It's when the immersion comes on. Maybe it is just on its way out.

Hi there, Recently had engineer out to our 11 year old Oso direct immersion water heater as it was slow dripping through tundish. He drained and refilled/reinstated internal air gap and no dripping now, however, when turned on it immediately starts making a slight whistling/squeal type noise...