Venturi shower mixer for low-pressure hot water boost?

Forums › Home Workshop DIY › Venturi shower mixer for low-pressure hot water boost?

GregV

835 posts

Ultimate Geek

#273063 2-Aug-2020 16:08

Interested to hear from people who have had experience with installing a venturi mixer in their shower. I currently have a low-pressure HWC, and am looking at a bathroom renovation. I'd like more shower pressure, and was wondering whether installing on of these would give me enough of a boost over what I've got now.

The alternative is either installing a mains-pressure HWC or getting gas instant hot water. I know both of these options will give me more shower pressure than the venturi, but they obviously cost a lot more to install.

Bung

3375 posts

Uber Geek

Subscriber

#2533260 2-Aug-2020 18:13

If you're referring to the Methven mixer we have one and it works. The shower is over a bath and is plumbed to the bath 20mm pipes and there is only a short distance to the cylinder. If your hot is a long run of 15mm I don't know how well it would go.

fearandloathing

240 posts

Master Geek

Lifetime subscriber

#2533264 2-Aug-2020 18:26

Spend your money on a mains pressure supply, make a compromise elsewhere. You will be pleased with the decision. We converted from low pressure to an infinity system for about $3500 I think.

Delphinus

457 posts

Ultimate Geek

#2533333 2-Aug-2020 20:11

I have a low pressure HWC and with the right shower head it makes all the difference. I am very particular about good showers (I hate a bad shower) and this is up there as a great shower. http://www.topliss.co.nz/products/shower-products/shower-heads-2/classic-110/

timmmay

16230 posts

Uber Geek

Trusted

Subscriber

#2533338 2-Aug-2020 20:30

We changed from low pressure to main pressure cylinder, it makes a massive difference. Go for it. So long as your fittings are rated for mains pressure you probably only have to change the cylinder. Most of our plumbing got changed as we moved the cylinder to the ceiling cavity, including a big wooden cage around it so it can't fall over and a drip tray that drains outside.

Tracer

342 posts

Ultimate Geek

#2533367 2-Aug-2020 22:18

Another option is a booster pump for the shower e.g. http://www.totalpumps.co.nz/shop/house-garden/grundfos-upa15-90n-home-booster/. Definitely look at going mains pressure with gas as well.