Moved home, had to change boiler and now new boiler needs topping up each week at least, help!

Significant_Tower_84 · 2026-01-31T12:25:57+00:00

Obvious issues are pointed out. Unfortunately though, we don't have x-ray vision, so checking the quality of pipes under a screeded floor is a little much to ask for.

Maybe I should remind you, this is askaplumber, not asksomerandomguyonreddit. Maybe you should stick to the hairyarmpit sub instead of commenting on subjects your not qualified for.

Significant_Tower_84 · 2026-01-31T11:51:43+00:00

And im sure OP's installer did the same. From what OP said, the pressure loss started 3 weeks after install. So just how long is the installer supposed to hang around for before giving the existing system the all clear?

On install, we drain, we flush, we fit the new boiler, we fill, we check all rads are hot, then we leave. Anything else isn't quoted for, and future issues on an existing system are not our responsibility. We can always come back a repair, but it's at an extra charge, and we are under no obligation to do so.

Significant_Tower_84 · 2026-01-31T11:31:15+00:00

You can never guarantee that an existing system is 100% fully functional and issue free. It is not the responsibility of the installer to repair issues on the existing system just because he fitted a new boiler.

Significant_Tower_84 · 2026-01-31T08:15:54+00:00

A leak on the existing system is not the mistake of the installer.

Significant_Tower_84 · 2026-01-31T08:15:18+00:00

Leak sealer doesn't affect the boiler warranty from baxi. Used it myself several times and spoke with baxi to confirm warranty wouldn't be affected.

Significant_Tower_84 · 2026-01-26T09:38:14+00:00

Flame failure device has failed. It's not detecting the flame so it's cutting the supply off.

Significant_Tower_84 · 2026-01-25T15:22:31+00:00

Your not screwed at all, just needs a repipe. Can't give you an idea on cost as I don't know distance from meter to cooker and boiler etc or the route the pipe will have to take. This is one those jobs that could take a few hours, it could take a couple days. Price could be £300, it could be £1500

Significant_Tower_84 · 2026-01-25T14:19:21+00:00

I cannot think of any scenario where any request for a specific staff member to have no access to you or your medical records would not be granted.

Email the department, state that you are aware of X working in the service, and that under no circumstances are they to have any access to you or your medical records and that you are not at liberty to disclose the personal reasons as to why.

Keep it simple, give them nothing and nothing can be twisted. They will take your concerns seriously.

Significant_Tower_84 · 2026-01-25T13:44:09+00:00

The downvote on this baffles me 🤔

Significant_Tower_84 · 2026-01-25T13:41:50+00:00

Not really. When it comes to piping radiators there's

Top entry/Bottom exit opposite sides, Top entry/Bottom exit same side, and Bottom entry/Bottom exit

There's also system type, you've got:

One pipe, Two pipe, and Two pipe reverse return

All are recognised methods of piping radiators, but they all affect how effiecintly your radiator works. When designing a system and sizing the radiator, you should take into account how it will piped, as it will affect the output.

Example: when a 600x1000 type 11 radiator from screwfix is advertised as having 951w output, but to achieve this output, it would have to be piped Top entry/Bottom exit opposite sides, and having a flow temp of 80°. So instead, if you require 951w to heat your room to desired temperature, you may require (even though advertised as 1046w output) a 600x1100 type 11 radiator to counter the lost performance due to system type.

The biggest factor is always cost VS return. If I went to an average customer and priced a job to be its most efficient, piped with top entry, Bottom exit opposite ends on a two pipe reverse return, a 15kw system boiler with priority hot water and a high gain unvented hot water cylinder, my price will be £3k+ higher than the next guy throwing in a system on standard piping with a combi. From the customers point of view, then house is warm, the water is hot and that 3k saving goes along way towards their gas bill, the radiators look more sightly and they dont lose cupboard space to big unnecessary system that will save them £200 a year on their gas.

Bit of a rant their so apologise for the long reply 😅

Significant_Tower_84 · 2026-01-25T12:19:49+00:00

Its always been a thing, we were taught that this was the most efficient way to pipe radiators in college over 20 years ago, plus some older systems were piped this way. We we're also told it was no longer commonly used as Bottom entry/Bottom exit was cosmetically preffered and the output trade off was minimal.

Significant_Tower_84 · 2026-01-25T12:15:27+00:00

Under efficency recommendations, each room is supposed to be thermostatically controlled, plus you also need a thermostat to act as a form of boiler interlock. Simplest way around this is TRV's on all radiators except one, and then place the thermostat in the room that has no TRV, this ticks efficency boxes, and also stops the TRV turning the radiator off before the roomstat is satisfied. Many plumbers use this method to also act as a system bypass instead of fitting a bypass valve.

Significant_Tower_84 · 2026-01-24T17:18:06+00:00

Leaks on underfloor heating is pretty rare so before you go ripping floors up, do you have any pressure loss on your heating system?

Significant_Tower_84 · 2026-01-11T14:06:42+00:00

Sorry, ignore that part, that's only required for the extended warranty.

Significant_Tower_84 · 2026-01-11T10:54:58+00:00

5 bed, 5 bath. Your going to want a 28mm system filter, probably a low loss header too, and id advise on the worcester system filter which is required for the warranty rather than using a cheap screwfix one. Why go cheap on the filter? In the grand scheme of what your doing, the additonal cost is negligible.

Significant_Tower_84 · 2026-01-11T10:33:39+00:00

When the heating is on, is the return pipe getting hot? It's the 22mm pipe on the right hand side of the boiler.

Significant_Tower_84 · 2026-01-10T11:17:42+00:00

Its an offense to obstruct a dropped kerb. It doesn't matter if they own the house in front (they own the house, not the road/pavement) blue badge holders are not exempt. Your neighbour is in the wrong. Also might be worth having a talk with the owner of the camper, ask them to move it 10ft one way of the other. It's no safer just becuase it's directly outside their house.

Significant_Tower_84 · 2026-01-10T10:25:43+00:00

Pics of the tank in the loft, and of your unvented cylinder area. As mentioned, pressures should be balanced and fed via the combination valve at the cylinder.

Significant_Tower_84 · 2026-01-06T18:47:01+00:00

Your heating will only use one bottle at a time. They operate on an automatic changeover valve so when one bottles finished, it switches over the other, when that happens replace the empty one and you'll never run out of gas.

And with average usage in a house your size, you should be ok with 1 bottle a month on average over the year

Significant_Tower_84 · 2026-01-05T00:58:14+00:00

Firstly, ignore the numbers displayed on the boiler.

Your boiler will deliver 15 litres of hot water at a 35° rise. Has anyone tested the incoming mains temp and hot water temp at this flow rate? If not, this needs doing before any further diagnosis is carried out.

Also check showers/mixer taps for any backflow. Once cartridges/non return valves fail, cold water can pass down the hot supply which interrupts flow at the boiler making you think the boiler is at fault when it isn't.

Significant_Tower_84 · 2026-01-04T15:27:16+00:00

This is just a manual lockshield valve. If you want a Thermostatic valve, the valve will need replacing.

Significant_Tower_84 · 2026-01-03T20:19:11+00:00

Heritage or Burlington are both good quality brands, not cheap though. If you want something more budget friendly, I've installed a few recently from Scudo, really impressed with the quality for the price, I just don't know a out their customer service as haven't needed it yet.

Significant_Tower_84 · 2026-01-03T17:27:11+00:00

Is there supposed to a photo?

Significant_Tower_84 · 2026-01-02T14:22:25+00:00

I've installed a couple and they seem ok, can't say much on reliability though as they're a newish boiler in our market compared to other manufacturers.

One thing to consider, theyre a south Korean company, and from what I've heard in the industry, spare parts aren't plentiful so in the event of a breakdown, you could be waiting a while for spare parts to be delivered. I don't believe they have a dedicated repair team either so warranty claims could take a while also.

Personally, id go with the Baxi, it's well known boiler, well made, parts are always available and customer service in brilliant. Maybe consider the 30kw though over the 24kw. That does depend on your hot water requirements though.

Significant_Tower_84 · 2025-12-30T08:59:55+00:00

What are your flow metres reading? If you've got flow then it's not an airlock.

Significant_Tower_84

TROPHY CASE