32ml pipe.

[lazy farmer]

In warm summer weather we reroute our field supply via a booster pump fed from the power hose/ plate cooler tank, so we can increase the pressure at the farm end of the line , made a huge difference in our case.
Had to put a full flow ball valve on the tank to keep it full enough. In hot weather the mains pressure really drops off in the yard close to the meter.

Agree with that we had the same issue when we were on mains
Have you tried a borehole?

 

[Water Wheel]

Agree with that we had the same issue when we were on mains
Have you tried a borehole?

Drill 52 m found water that much sulphur in it I gave up. Smells like rotten eggs!

 

[Horn&corn]

Ours smells of rotten eggs when we acid treat it for high iron. It goes fine after 2 weeks of pumping to ditch. Have you investigated all possible options to treat? There’s a lot of good equipment in USA to tackle most issues

 

[blackisleboy]

Yes but I'm stuffed if I can work out by how much. @Sharpy will be able to tell you

Pipe Loss Calculator

Pipe flow loss calculator. The results generated by using this tool are to be used for rough guidelines/estimates only.

www.ukpumpsupplies.co.uk

 

[Humble Village Farmer]

You can actually just pull it out with a vehicle. You just need someone to stand by the coil to lift off and prevent kinking. Once stretched out, it will untwist

 

[shumungus]

I wish I had put 32mm on the main up the farm instead of 25mm, as I thought I would get less pressure loss (200' of rise, and I think 900yards distance), am I right in thinking the pressure loss would be less?

Don't understand this. Surely it doesn't matter what size pipe you use regards pressure pressure at end point when stopped is going to be the same in a 63mm pipe as a 20mm? What pipe size determines is flow rate and pressure during use and a larger bore pipe is going to give better flow rates and higher pressure. I can't see any benefit in choosing a smaller bore pipe for a long run.

 

[mezz]

Don't understand this. Surely it doesn't matter what size pipe you use regards pressure pressure at end point when stopped is going to be the same in a 63mm pipe as a 20mm? What pipe size determines is flow rate and pressure during use and a larger bore pipe is going to give better flow rates and higher pressure. I can't see any benefit in choosing a smaller bore pipe for a long run.

Not the case. The pipe wall causes friction, so there will be a pressure drop along the pipe. The bigger the pipe, the less the friction and the less the pressure drop. With a long enough pipe there will be zero flow (and zero pressure), assuming the pipe is not going downhill.

 

[shumungus]

Not the case. The pipe wall causes friction, so there will be a pressure drop along the pipe. The bigger the pipe, the less the friction and the less the pressure drop. With a long enough pipe there will be zero flow (and zero pressure), assuming the pipe is not going downhill.

Nope, don't agree on the static pressure bit. flow yes as pipe wall friction losses as a percentage of volume moved.
Surely static pressure is independent of this as it is measured commonly in bar, given that 1 bar pressure gives you a head of 10m regardless of pipe diameter of 10mm or 1000mm and regardless of distance. Have you ever seen or worked with a water level?
Water level (device) - Wikipedia
These are solely reliant on the fact that static pressure is constant over distance and only influenced by temperature. Shipyards commonly used them as they could transfer levels around corners and through bulkheads over distances with great accuracy. They are still used in mammoth engineering projects as lasers don't take into consideration the curvature of the earth, water levels miles long of small bore tubing have been used in the past.

 

[mezz]

Nope, don't agree on the static pressure bit. flow yes as pipe wall friction losses as a percentage of volume moved.
Surely static pressure is independent of this as it is measured commonly in bar, given that 1 bar pressure gives you a head of 10m regardless of pipe diameter of 10mm or 1000mm and regardless of distance. Have you ever seen or worked with a water level?
Water level (device) - Wikipedia
These are solely reliant on the fact that static pressure is constant over distance and only influenced by temperature. Shipyards commonly used them as they could transfer levels around corners and through bulkheads over distances with great accuracy. They are still used in mammoth engineering projects as lasers don't take into consideration the curvature of the earth, water levels miles long of small bore tubing have been used in the past.

The water level device works because it is based on atmospheric pressure. Imagine, for a moment, the atmospheric pressure was different between the two ends of the level, the water would be at different levels. (such as storm surge - the sea level rises because of very atmospheric low pressure)
The fact the water level device works is irrelevant to the fact there is friction loss in a pipe. Roll out a 1000m of pipe, one end to a pump with a pressure gauge and the other end with a pressure gauge. The end far away from the pump will be a lower pressure. This pressure drop is predictable based on pipe size.

 

[shumungus]

The water level device works because it is based on atmospheric pressure. Imagine, for a moment, the atmospheric pressure was different between the two ends of the level, the water would be at different levels. (such as storm surge - the sea level rises because of very atmospheric low pressure)
The fact the water level device works is irrelevant to the fact there is friction loss in a pipe. Roll out a 1000m of pipe, one end to a pump with a pressure gauge and the other end with a pressure gauge. The end far away from the pump will be a lower pressure. This pressure drop is predictable based on pipe size.

Yes there will be a drop in pressure of moving liquid but not static.

 

[shumungus]

Yes there will be a drop in pressure of moving liquid but not static.

Recent example. Water authority here have been re laying water mains and up grading the network. Water kept being turned off and on in the middle of the night and we had problems with pressure spikes on un regulated spurs. Talked to engineers and they told me they were leak and pressure testing the main at night when demand was lowest to get most accurate reading. Test pressure was 8 bar on a pipe 17 miles long 200mm diameter. Pumping station one end, stop end the other expected margin of error 0.5 bar if no leaks and minimal take off.

 

[mezz]

Recent example. Water authority here have been re laying water mains and up grading the network. Water kept being turned off and on in the middle of the night and we had problems with pressure spikes on un regulated spurs. Talked to engineers and they told me they were leak and pressure testing the main at night when demand was lowest to get most accurate reading. Test pressure was 8 bar on a pipe 17 miles long 200mm diameter. Pumping station one end, stop end the other expected margin of error 0.5 bar if no leaks and minimal take off.

You're right if there's no flow, there will be no friction loss, but quite frankly who cares what the pressure is when the tap is turned off? What matters is the pressure when the tap is turned on and what flow rate you get, in that case the bigger the pipe the less the pressure drop there will be and the greater the flow.

 

[shumungus]

You're right if there's no flow, there will be no friction loss, but quite frankly who cares what the pressure is when the tap is turned off? What matters is the pressure when the tap is turned on and what flow rate you get, in that case the bigger the pipe the less the pressure drop there will be and the greater the flow.

Yup, that's what I said in my first post.

 

[HasthorpeGrange]

buy the pipe on a spool like this, chains onto a bar through the centre lifted with the loader and something on the end of the pipe to drive across the field pulling it out

 

[multi power]

Don't understand this. Surely it doesn't matter what size pipe you use regards pressure pressure at end point when stopped is going to be the same in a 63mm pipe as a 20mm? What pipe size determines is flow rate and pressure during use and a larger bore pipe is going to give better flow rates and higher pressure. I can't see any benefit in choosing a smaller bore pipe for a long run.

I think people are confusing flow and pressure, 2 VERY different things

 

[In the pit]

One of the best things to do is create a ring so water flows to a tank from both directions

 

[Happy hillbily]

I've not regretted putting 700m of 50mm pipe here.