COMMUNITY FORUM

rti4up

02:59PM | 01/13/07
Member Since: 01/12/07
2 lifetime posts
Bvplumbing
What is the safe water pressure for a house. Mine is 90 psi just after the regulator.

Sylvan

07:22AM | 01/14/07
Member Since: 01/24/06
1566 lifetime posts
Me_office1
Having 90 PSI coming into a home is ludicrous, although NYC plumbing code state that if the pressure exceeds 85 PSI it had to be reduced to no more then 85 PSI and even that kind of pressure is uncalled for unless you have fire suppression system then I would allow the 90 PSI to be used for this only and then reduce the pressure right after the fire protection connection.

Excessive pressure can cause hydraulic shock (water hammering) and in the case of ferrous and non ferrous metal piping you can have serious erosion problems especially with copper.

Here are some examples that 90 PSI are capable of

1- 90 PSI will elevate water to a height of an astonishing 207.9 feet (neglecting friction losses)

2- The velocity would be 33 FPS which is over 4 times that recommended for copper tubing

3- If a 1" pipe should burst you would have water flowing at a rate hovering around 82.5 GPM (full flow)

Your hot water heater builds up pressure as the water is heated so now your looking at the T&P going off or you will need an expansion tank to allow fro the pressure build up

If you have a washing machine with rubber hoses you are straining these and looking for a plumbing disaster

More is not necessary better in this case.

Just to arbitrarily allow 90 PSI into a home is just plain irrational as you gain anything but a very strong shower.

Pressure should be calculated as to what your needs are.

For example one takes the height of the structure where the highest waster supply is needed and figures the static pressure so they have an idea what the pressure loss is, then one looks at the manufactures literature to find what pressure range they suggest like a flushometer needs no less then 35 PSI ( depending on model)

I know this maybe hard to comprehend but there are a lot of self proclaimed "plumbers" who have no clue to formal training and never would think of finding out why we size piping according to fixture demands and friction losses.

It is like going to a doctor who learned by on the job training and never bothered to go to medical school as schooling is for nerds who want to actually learn the why and how's of decent plumbing practices.

Good luck ..... By the way do you happen to live outside the USA?

rti4up

10:37AM | 01/14/07
Member Since: 01/12/07
2 lifetime posts
I live in CA. I think the regulator is bad, but wanted to see what the correct pressure should be. Thanks for letting me know that it is as I thought...waayyyy tooo high

RTI

Sylvan

12:59PM | 01/15/07
Member Since: 01/24/06
1566 lifetime posts
Me_office1
Your very welcome, By the way with this excessive pressure NOW IS the time to consider using a hose to clear sluggish drains WHOOSHHHHHHHHHHHHHHHHHHHHH
Click_to_reply_button
Inspiration_banner

INSPIRATION GALLERY



Post a reply as Anonymous

Photo must be in JPG, GIF or PNG format and less than 5MB.

Reply_choose_button

Anonymous

Post_new_button or Login_button
Register

If you're on the fence (or on a budget), there’s always the old standby—paint. A change in color can have a huge impact on... Filling an underutilized area beneath the stairs is a smart way to save space. Doing so with a stash of wood, however, is ... The Audubon Society inspired wallpaper in this Adirondack-styled entryway will get you in the outdoor mood. Grab your coat... Chalkboard paint opens up endless possibilities for customizing your dresser time and time again. Use chalk to label the c... A fireplace in the bathroom creates the ultimate setting for relaxation. Homeowners often choose electric or gas over wood... Yes, a freestanding garage can become its own tiny house. Artist Michelle de la Vega has all the comforts of a modern resi... There’s nothing like a new set of cabinet hardware to refresh a room. The possibilities are endless: Go modern, rustic, or... A kitchen in a greenhouse—who wouldn't enjoy spending time in this light-filled space? Details that enhance the conservato... Chalkboard paint features prominently in this elegant yet unpretentious headboard design. Add a new message daily to reflec... Twine lanterns add pops of crafty—but sophisticated—flair to any outdoor setting. Wrap glue-soaked twine around a balloon ... The indecisive homeowner need not fret over choosing one (or even two) cabinet colors. The kitchen cabinets in this artist... Incorporate nature into your lighting scheme by securing a dead tree in a concrete mold and draping your pendant lamp from... Simple and striking, a couple of pieces of "lovingly used" furniture creates a special kind of charm. A weathered chair fo... The Infinite Artisan Fire Bowl from Eldorado Outdoor is made from glass-fiber reinforced concrete, and offered in Oak Barr... The vibrant green of Granny Smith apples make a beautifully natural alternative to the traditional evergreen wreath. Brigh...
Follow_banner_a
Newsletter_icon Google_plus Facebook Twitter Pinterest Youtube Rss_icon
 
webapp1