what size waterline do i need?

Question

I will be running it aprox. 450' slightly uphill to a mobilehome. What size pipe do I need for PVC? I have been told 3/4", and also 1". Someone also told me I would probally need a pump!! Please tell me no. I do not want to be taking a shower when someone flushes the toilet and I have no water pressure. I am running the line myself. I have to save as much as I can. thank you for any help.

I will be hooking up from a county water service. slightly uphill I would say about 10' to maybe 15' rise (difference from the start of the pipe run to the finished pipe run at top). so, if I went with a 1 1/4" pvc I should have plenty of volume? would I maintain more pressure with the bigger pipe or just the increased volume? I have too call the water department to find out what my pressure coming in will be, i hope they will know.

Answer 1

i would run 1" and then reduce it to 3/4 when it gets to the home. make sure to install in line check valves to keep the water in the pipe from creating too much pressure (weight) going back downhill. You may need a pump for that distance depending on the pressure going in the pipe. The check valves will help reduce that need to some extent.

Answer 2

First off, what are you hooking it to? You are either hooking it to an existing water pipe in your house or a well? If you arent hooking it to a presurized line you will need a pump. Good pressure is essential but water volume is even more important! I would go with at least a one inch pvc line. I dont know how steep your grade is but if you are pumping from a well youre going to need a good pump. Make sure the inlet and outlet of the pump is at least as big as the pipe you are using. More details on aproximate difference in height, what your water source is....would be helpful.

Answer 3

do you know the PSI of the water at the curb? or the water main itself? the Water company should have this info for you. with a run this long, Ideally you should have at least 50 psi or better at the main. If you do, great! run a 3/4 inch line. general rule of thumb: most service lines are 3/4 inch. Pressure is the key word here. not size. going with just size will only give you volume 3/4 line will give you less volume than a 1 inch. again, pressure is the key factor in planing service lines. volume isn't any good without correct pressure

Answer 4

Depends on what you mean by "slightly uphill".You will probably lose 1 lb of pressure per 1 ft. rise.Most of the houses I have worked on use 3/4" (big difference in price) you don't want your pressure to fall below 40lbs.I myself just put in 4000' but it was only a 8' rise at the worse point (was for a barn)Have you thought about useing a raised holding tank?Just re read your question.You can measure your preasure at the meter.The 3/4 pipe preasure will drop if 3 faucets(usualy 1/2" at faucet or toilet)If your slope is 15' uphill you are going to lose 15lbs of preasure before it gets to your feeder to the trailer.If you flush and the shower gets hot just turn the stop valve on the toilet half way on(toilet tube is usualy 3/8") and try again(so it takes longer to fill the tank).

Answer 5

I would go with 1-1/4" to the trailer and then 3/4" on the main. You can operate two appliances off of 1/2" branches. Since your running PVC, you can easily install a pump and cistern later if it is determined that you need one.