Shower installation

targus

I am thinking of changing my shower which is a mira sport.2 1/2 inch pipes feed it at the moment. If i wanted to change to a seperate 1.5 bar pump in the attic do i need to change to 3/4 inch to the new mixer valve? Also do i need a twin impeller pump and will an ordinary pump do or do I need a negative head pump.thanks in advance.

Joey the lips

targus wrote: »

I am thinking of changing my shower which is a mira sport.2 1/2 inch pipes feed it at the moment. If i wanted to change to a seperate 1.5 bar pump in the attic do i need to change to 3/4 inch to the new mixer valve? Also do i need a twin impeller pump and will an ordinary pump do or do I need a negative head pump.thanks in advance.

Your asking a lot of questions in a short paragraph without telling much but will try help a little...

Firstly a mira sport is an electric shower which means its a mains fed shower. That means it takes cold water mains and heats it... Its a single feed and its half inch. Are you sure you have 2 feeds.?

Are you buying a new mixer valve? What type of mixer valve are you buying. What size head are you using on it. If you are buying a thermostatic or manual mixer valve they may have a min operating pressure so be careful. Also any head over 6 inches will prob require a 3 bar pump to run. You may not have sufficent capacity in your tank if this is the case.

Weather a standard impeller or a twin impeller will do will depend on a couple of reasons. It amounts to the vertical distance between the header tank in the attic and the shower head. Or do you live in an apt. or have you had an attic conversion.

As you are now switching from a mains fed shower to a pumped shower valve you will require a store of hot water which you did not before. How many people live in the house. Having got use to instant water this might not be the best way to go.

targus

Sorry for the hasty post! Its actually a mira event not a sport which i have at the moment. I'm just planning ahead and havent settled on any particular brand names.

i have 2 big cold water coffin tanks in the attic and a 3/4 hot feed travelling accross the attic to feed the bath. I was hoping to locate the pump there as the shower i plan to replace is in a bedroom below it.I was just trying to find out what size and type of pump i'd require. Hadnt thought to much about what type of head I was going to use in the shower only that it would be a standard thermostatic valve.

I have a t90 shower in the main bathroom that the kids use so this would be the only shower drawing off the cylinder which is a standard 30x18 which I was also wondering would be big enough? There will be no body jets just a shower head.

Joey the lips

Are the tanks sitting on the floor of the attic.... As apposed to raised up... I take it you have an attic conversion...

If your going to sit the pump above the ahower valve like this then yes you will need it to be negative however I am not sure if this will work.

You will need to sit the pump next to your hot water cylinder as the hot water will not travel up to meet the pump causeing cavitation in the pump.

As you have only a standard cylinder you pump will be wasted if its more than 1.5bar and yes negative head sounds the way to go.

Have a plumber survey it.


Just for the records. A mira event is a power shower. This means it pumps the hot and the cold. If you can interupt this feed in the hot press the plumbing will be easier. Not cheaper though;)

targus

Yes tanks are siiting on the floor of the attic. well if you reckon the hot water wont travel on its own when the pump calls, beside the cylinder it will have to be, thats why I'm asking these questions.!

I will be getting a plumber to have a look. Finally, in your opinion what are the best brand of pump and thermostatic valves to go for?

Many thanks for the replies.

Joey the lips

targus wrote: »

Yes tanks are siiting on the floor of the attic. well if you reckon the hot water wont travel on its own when the pump calls, beside the cylinder it will have to be, thats why I'm asking these questions.!

I will be getting a plumber to have a look. Finally, in your opinion what are the best brand of pump and thermostatic valves to go for?

Many thanks for the replies.

Me? if i had the money it would be a moonsoon 1.5 pump be it positive or negative and a grohe thermostatic low pressure shower valve with a riser rail kit.

targus

Just as a matter of interest why a riser rail and not a fixed head?

Joey the lips

targus wrote: »

Just as a matter of interest why a riser rail and not a fixed head?

Fixed head suits the men but the women.....

Women gets up saturday morning.... Rushes around sorting the kids.. Heads off to get her hair done as she is going out that night. Runs into town to pick up that little black number or these days collects it from the dry cleaners. Comes home sorts the kids out then decides she needs a shower before she goes out cause she is all sweaty....

This is despite the sexist aspect the typical family day....

If you have a fixed head shower she will have to wear a shower cap or ruin the 50 euro hair cut she just got.

If you have a riser rail kit she drops the head down slightly and showers from her shoulders down....

You see this is why more women should be plumbers.

targus

LOL! I wont show that that to the boss so