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
1548 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
1548 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

captcha
type the code from the image

Anonymous

Post_new_button or Login_button
Register

Put up a hinged mirror to conceal a recessed storage cabinet. In tight quarters, opt for a thin mirror that can sit almost... It turns out that many bath and kitchen cleansers contain chemicals that are dangerous to the skin and eyes, and often pro... So often we paint tiny nooks white to make them appear larger, but opting for a dark, dramatic wall color like this one—Be... Chocolate-colored walls and large window frames allow the exposed wood beams to take center stage in this small screened p... If you're not crazy about the idea of commingling plants and pool, this modern variation may be more to your liking. The s... 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... Pursue what's known as the stack effect. To achieve it, open the windows on both the upper and lower floors, and as warm a... Like no other floor type, a checkerboard design works wonders to underscore the retro kitchen theme. Vinyl flooring, ceram... Twine lanterns add pops of crafty—but sophisticated—flair to any outdoor setting. Wrap glue-soaked twine around a balloon ... When securely fastened to a tree or the ceiling of a porch, a pallet and some cushioning make the ideal place to lounge. V... Incorporate nature into your lighting scheme by securing a dead tree in a concrete mold and draping your pendant lamp from... For the cost of a can of exterior paint , you can totally transform your porch. Paint the floor a hue that complements yo... In this urban apartment, a standard-issue patio became a serene and green perch by replacing the typical concrete with gro... If you put the washing machine in the mudroom, you can stop the kids from walking through the house in dirty, grass-staine...
Follow_banner_a
Newsletter_icon Google_plus Facebook Twitter Pinterest Youtube Rss_icon
 
webapp1