Using poly (pressure) pipe on Air Compressor

**spudboy** · 23rd November 2010, 07:57 PM

Originally Posted by blitz

Amongst other things I teach soldering copper pipe for a living, I am a Refrigeration Trade Trainer and yes I have all the gear you need and i am happy to help you and teach you how to solder if you want as well.

i dont have the pipe but i can come and have a look at what you want and work out what you need to do it for you.

What an offer! I'd love to learn how to solder copper properly. Thanks

I can get the copper pipe from the local Mitre 10 + a bunch of fittings.

I'll send you a PM with my phone details etc. and we can have a chat if you like.

Cheers
David

**bee utey** · 23rd November 2010, 08:03 PM

Originally Posted by spudboy

What an offer! I'd love to learn how to solder copper properly. Thanks

I can get the copper pipe from the local Mitre 10 + a bunch of fittings.

I'll send you a PM with my phone details etc. and we can have a chat if you like.

Cheers
David

Price it first, then try Scott's Plumbing shop at Klemzig. The hardware shop may give you 10% off retail, I always got better from Scott's. Copper is expensive these days.

**spudboy** · 23rd November 2010, 08:04 PM

Rileyen - A pump's specs will have a "head" figure, which is the theoretical vertical distance the pump will push water.

The pump will have a "head" curve which flattens out at the top, and this is the highest distance it will pump water. i.e. the flow rate at (say) 40 m height head will be less than the flow rate at 10m height head.

Does that make any sense?

**bee utey** · 23rd November 2010, 08:08 PM

Originally Posted by Rileyen

A pump is said to be capable of pumping water up to 100 meters, but I don't want to confirm that by actually putting up a very long pipe to that height. I know that pressure is related to height, so putting pressure at the output end of the pump would simulate different heights. Any suggestions how I can rig a contraption to do this? Thanks.

10 metres or 33 feet head of water equals one atmosphere (100kPa) or 14.7 psi approx. So I would tee a pressure gauge and valve to the outlet. Screw down the valve to read the pressure at your chosen delivery rate, you would be looking for 147psi maximum or thereabouts.

d@rk51d3 · 23rd November 2010, 08:24 PM

If you want to use copper, go to tradelink for a quote. They're the ones who sell it to all the other retailers, so you should be able to save a little bit, if you nab the right guy.

**Fluids** · 23rd November 2010, 10:44 PM

Originally Posted by Rileyen

A pump is said to be capable of pumping water up to 100 meters, but I don't want to confirm that by actually putting up a very long pipe to that height. I know that pressure is related to height, so putting pressure at the output end of the pump would simulate different heights. Any suggestions how I can rig a contraption to do this? Thanks.

Simple.

Attach a tap/valve to one side of a 3/4" Tee peice

Attach a pressure guage to another side of the tee peice

Connect 3ft or so of pressure capable hose to the tee peice. (not clear food/beverage hose - must be reinforced hose)

Connect the other end of the hose to the pump outlet.

Start the pump with the tap/valve open.

Pump is now delivering water, and the pressure guage shows a reading.

Slowly close the tap/valve until no water flows. The pressure the guage now shows is the pumps "shut-head".

If that is a PSI figure, multiply by 2.31ft

(10psi = 23.1ft)

If it's a kPa figure, divide by 10 and your result is expressed in M

(70kPa / 10M = 7M ... or 23ft)

To fill a tank 23ft/7M in the air, your pump needs to make 10psi just to get the water to the top of the tank (static). ... 10psi=23ft=7M head.

Using this device you can check the pumps shut-head, and output at differing heads or flow rates ... how many volumetric units, per measure of time, at what discharge pressure/head ...

Cheers

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