Water Main Size - Posted by Marty

Posted by Tony in New Jersey on October 26, 2004 at 13:02:50:

This line is definitely too small. Ideally, you would need a 2" pipe, reduced to 3/4" to give proper pressure to that many homes.

Most single family homes have 1" coming from the street and reduced to 1/2" throughout the house.

Water Main Size - Posted by Marty

Posted by Marty on October 25, 2004 at 20:18:32:

Hello All,

I am looking at a mobile home community that has 52 spaces with room to add 10 more. The water is city water. I am doing my DD now and the current owner told me he replaced half the water lines in the park. He told me he used 1/2 inch black plastic pipe rated to 100 lbs. pressure per square inch for the main. (1) Is this size water line sufficient for this community? It seems a little small to me. (2) Generaly speaking are the laterals the same size as the main in a MHP? (3) As far as the water lines are concerned, what else should I be taking note of?

Thanks for your time and input.
God bless,

Re: Water Main Size - Posted by Eli

Posted by Eli on October 27, 2004 at 01:50:10:

If I were you I would check this out, I am not a plumber but I cant imagine 42 homes being serviced by a 1/2 inch main. I think that would be impossible, but again I am no expert. I think we have all been in a house one time or another where you get scalded when someone flushes the toilet. Can you imagine 12 homes showering and 5 flusing the toilet at one time? And that is not even counting who is doing the dishes and who is watering the lawn. Do a little more DD on this one, I think you will uncover something different then what the owner is saying.

Now having 1/2 inches servicing that many homes seems impossible to me. I would bet that he has larger main lines and then they T off into the half inch and then go into the homes. If he is absolutely adiment about there being a half inch main, look at it yourself, go lift the main water meter cover and take a look. (assuming it has one)

Re: Water Main Size - Posted by Dickie-Alabama

Posted by Dickie-Alabama on October 26, 2004 at 23:32:21:

In my park(47 lots) the water main is 4" with 3/4" tap on each lot. The 1/2" main line is way to small, check your city or county code. Good luck!

Re: Water Main Size - Posted by Joe C. (AR)

Posted by Joe C. (AR) on October 25, 2004 at 23:46:18:

It seems small to me too. Ask the tenants about water pressure at peak times, if you can. A peak time would be 6:30-8:30 AM weekdays. Pressure will be reduced during peak times if the line is too small.

My park is about the same size as the one you describe. I have three lateral 2" pvc lines reduced to 3/4" at each site. Never had a problem with that but I don’t know how much smaller would be sufficient.

Joe C. (AR)