Megaflo or no?

tupenny

We are ready to go ahead with a loft conversion, but stalling because we're totally confused about what we do or don't need in terms of boiler / megaflo to go with it.

We currently have one bathroom - will have two post-conversion. Our pressure (combi boiler) is good - but we're told it's possible we'll have problems with 'flow' (what's the difference?) using two bathrooms.

It seems like a megaflo would be a huge upheaval / involve ripping up the floor on ground level. Does it sounds like it would be worth it?

Any expert or experienced advice would be huuugely welcome.

Thanks,

Natt

diywhynot

tupenny wrote: »

We are ready to go ahead with a loft conversion, but stalling because we're totally confused about what we do or don't need in terms of boiler / megaflo to go with it.

We currently have one bathroom - will have two post-conversion. Our pressure (combi boiler) is good - but we're told it's possible we'll have problems with 'flow' (what's the difference?) using two bathrooms.

It seems like a megaflo would be a huge upheaval / involve ripping up the floor on ground level. Does it sounds like it would be worth it?

Any expert or experienced advice would be huuugely welcome.

Thanks,

Natt

Have a look here (Domestic Water Systems).

mart.vader

tupenny wrote: »

We are ready to go ahead with a loft conversion, but stalling because we're totally confused about what we do or don't need in terms of boiler / megaflo to go with it.

We currently have one bathroom - will have two post-conversion. Our pressure (combi boiler) is good - but we're told it's possible we'll have problems with 'flow' (what's the difference?) using two bathrooms.

It seems like a megaflo would be a huge upheaval / involve ripping up the floor on ground level. Does it sounds like it would be worth it?

Any expert or experienced advice would be huuugely welcome.

Thanks,

Natt

Pressure and Flow are different. Pressure can be as high as you like, in a sealed system, but until someone opens a valve, there is no flow.

Have just done what you are about to do. Loft Conversion + en-suite.

My first floor shower has always been "OK" or "adequate". I had a lot of doubts about whether there was enough pressure/flow to serve another shower in the en-suite, one floor higher.

I was given lots of conflicting advice, even from plumbers. The plumber working for the builder said "Its no problem if there isn't enough pressure - we'll just fit a pump". Then on checking elsewhere, I find that you can't fit a pump with a combi boiler because it means pumping from the mains.

"Oh, no problem, we'll fit a megaflow" says builder, "but it'll cost you ££££".

Then I find out that you can fit a mains pump, but it's an expensive beast. Salamander Pumps make one at IIRC circa £378. and it needs to be fitted on the incoming mains pipe.

My mate (who teaches plumbing) told me to get the plumber to cut the tees into the pipes and then get a competent plumber to measure both pressure and flow at that point. The builders plumber did that, and said the pressure is "good", didn't bother with a gauge, and he assured me that it would be OK. And luckily it was, because there's no room (or money) for a megaflow.

The new shower is also adequate (with no pump) with one of those big "rain" shower-heads - takes a while to get hot though.

My advice is to do what my mate told me to do, get a decent plumber to cut tees in and measure it. That said, if you're in the early stages, get him to measure mains pressure/flow at taps and tell you what it will support.

cddc

diywhynot wrote: »

Have a look here (Domestic Water Systems).

Great link that!