need some suction line info for a Grundfos pump

[dslywalker]

I'm running a 170' suction line to a

https://www.supplyhouse.com/Grundfos-99463940-JP-PS-16-07-177-1-Stage-Shallow-Well-Jet-Pump-Stainless-Steel-115-230V-3-4-1-5-HP

Its coming off a 2500 tank with 3' drop in elevation. Question is i would like to use flex due to cold weather right now and 30 joints glued in cold weather and buried in the dirt scares me.. Owner said the pump guy said to use 1" sch40 pvc..The pump intake is 1" and they already bought everything..This place is 2 hrs off the main road and i hate to go back for whatever reason once i'm done. I'm thinking more like 11/4 pipe but i know you guys on here are far better than me and been at it longer
Thanks Mike

 

[Valveman]

30 joints is 600'. At 10 GPM flow 1: sch 40 will have 2.4 PSI loss per 100'. That would be 14 PSI loss if this was a discharge line. For a suction line that is too much restriction and could cause the pump to cavitate. 1 1/4 has almost no loss at 10 GPM and would be much better for a suction line. I would use 160# poly pipe as you can get it in 500' rolls, which would save a lot of connections. I think the poly is much more forgiving than PVC in a ditch, especially if there are any rocks.

 

[Sponsor]

 

[Fitter30]

Call the pump manufacturer ask for tech to get a pump curve for the suction side or pump suggestion. 3' is only 1.3 lb of pressure

 

[dslywalker]

30 joints is 600'. At 10 GPM flow 1: sch 40 will have 2.4 PSI loss per 100'. That would be 14 PSI loss if this was a discharge line. For a suction line that is too much restriction and could cause the pump to cavitate. 1 1/4 has almost no loss at 10 GPM and would be much better for a suction line. I would use 160# poly pipe as you can get it in 500' rolls, which would save a lot of connections. I think the poly is much more forgiving than PVC in a ditch, especially if there are any rocks.

View attachment 94505

actually there 10' sticks of 1" pvc and 170' suction run...So this poly pipe #160 is good for a 170' suction line?160 i presume is PSI? Back on the farm in Iowa we used a black flexible pipe like 1" for hydrants..Must be the same stuff..
If i lay 170' of 1 1/4" in a ditch it would be enough for a suction line?Could go 1 1/2" too. Can you give me the link to where you get it at Please. So, i don't get the wrong stuff.
You helped me with my last suction line. Seems like i can't find a job where the tank is close to the pump..
Anyway, bought a PK1 pump kit from you few years ago. Its been working good ever since..It had a 200' suction line

Question on water suction line and pump setup

Currently in the process of installing a water pump system for business.Business curtails of a small kitchen and bar and men and womens restroom...Upstairs is a old brothel upstairs consisting of 6 rooms and one toilet and shower at the end of the hall..Kitchen has just the usual triple sink...

terrylove.com

 

[Valveman]

Yeah probably same pipe. Roll pipe with barb fittings and hose clamps. 125# would be enough, but 160# is much thicker and tolerates rocks and things better. Use extra long Brass barb fittings with two hose clamps, and tape over the hose clamps with electric tape. I just bought some at supplyhouse.com. They should give me a commission. Lol! And Thanks!!

 

[dslywalker]

Yeah probably same pipe. Roll pipe with barb fittings and hose clamps. 125# would be enough, but 160# is much thicker and tolerates rocks and things better. Use extra long Brass barb fittings with two hose clamps, and tape over the hose clamps with electric tape. I just bought some at supplyhouse.com. They should give me a commission. Lol! And Thanks!!

how hard is it to roll that poly out at 50 degrees. Probably going to have get a case of beer and wrestle it like a pet coon.

 

[dslywalker]

how hard is it to roll that poly out at 50 degrees. Probably going to have get a case of beer and wrestle it like a pet coon.

yes they should grease your palm with some green. Thanks for your advice

 

[Valveman]

how hard is it to roll that poly out at 50 degrees. Probably going to have get a case of beer and wrestle it like a pet coon.

They are big rolls. Just roll from top of the hill dawn as rolling that big roll uphill would not be fun, but you could do it.