Advice required from Heating & Plumbing Engg

The quoted work is only a day's worth, materials are maybe £500, £600 at a stretch.

I would strongly suggest upgrading to an unvented cylinder if you're going to the expense of changing it already.

Would you also need to flush the system before refilling?

Thanks - enquired about the unvented cylinder and quote has come in at £1700 + they will need to do a flow rate test first apparently. Its a bit over my budget at the moment. Reading up on this, one of the pros of unvented is it would help to put it anywhere else in the house but I don't have that option tbh plus don't want to end up in a situation where the boiler does not work and there is no hot water either.

themorgatron12/09/2017 00:25

The quoted work is only a day's worth, materials are maybe £500, £600 at a …The quoted work is only a day's worth, materials are maybe £500, £600 at a stretch. I would strongly suggest upgrading to an unvented cylinder if you're going to the expense of changing it already.Read lessRead more

diamondnine11 h, 55 m ago

Would you also need to flush the system before refilling?

Had a power flush done recently - so all covered on that front Thanks

am10651 h, 35 m ago

Thanks - enquired about the unvented cylinder and quote has come in at …Thanks - enquired about the unvented cylinder and quote has come in at £1700 + they will need to do a flow rate test first apparently. Its a bit over my budget at the moment. Reading up on this, one of the pros of unvented is it would help to put it anywhere else in the house but I don't have that option tbh plus don't want to end up in a situation where the boiler does not work and there is no hot water either.Read lessRead more

I would get a couple more quotes.

An unvented cylinder is <£200 extra materials over a vented. Pressure relief pipework is usually easily routed. The only possible expense can be upgrading the cold feed. It's feasible to live with just the 15mm incoming (lower flow rate) already at the airing cupboard if budget is tight.

I would even go to the extreme of fitting an unvented cylinder as a vented set up. Sell the cold inlet, expansion and zone valve and you've made the extra expense back. You're then left with a lifetime warranty cylinder, with much better insulation values.