I need to do some water testing of a skylight assembly that is about 80' above the ground. When I run hoses up the skylight, the pressure drop is so great that I don't get much water flow.

If I can get a pressure washer up to the skylight, can I use it to boost the pressure and increase the volume of water flow? Put another way, can I use it as an auxiliary pumping device to augment flow, or will the low pressure at the intake limit my flow?

Thanks,

Ian

On Aug 29, 9:16*am, Ian wrote:
I need to do some water testing of a skylight assembly that is about 80' above the ground. *When I run hoses up the skylight, the pressure drop is so great that I don't get much water flow.

If I can get a pressure washer up to the skylight, can I use it to boost the pressure and increase the volume of water flow? *Put another way, can I use it as an auxiliary pumping device to augment flow, or will the low pressure at the intake limit my flow?

Thanks,

Ian

Most power washers don't have much volume. You might be better off
with a regular electric pump.

Some units won't run, if the intake pressure is less than
some number of PSI.

I'd suggest the pressure washer at ground level, and push
the water from below.

--
Christopher A. Young
Learn more about Jesus
www.lds.org
..


"Ian" wrote in message
...
I need to do some water testing of a skylight assembly that
is about 80' above the ground. When I run hoses up the
skylight, the pressure drop is so great that I don't get
much water flow.

If I can get a pressure washer up to the skylight, can I use
it to boost the pressure and increase the volume of water
flow? Put another way, can I use it as an auxiliary pumping
device to augment flow, or will the low pressure at the
intake limit my flow?

Thanks,

Ian

In
,
Ian typed:
I need to do some water testing of a skylight assembly
that is about 80' above the ground. When I run hoses up
the skylight, the pressure drop is so great that I don't
get much water flow.

If I can get a pressure washer up to the skylight, can I
use it to boost the pressure and increase the volume of
water flow? Put another way, can I use it as an
auxiliary pumping device to augment flow, or will the low
pressure at the intake limit my flow?

Thanks,

Ian

Depends; look up the flow rates vs height for YOUR pressure washer, along
with the gph rating it needs, which you can easily measure from an 80' high
position. None are likely to work, but some methods might.
Better off with a legit pump that can pump that high; that's why they all
have specs supplied with them.

On Mon, 29 Aug 2011 06:39:34 -0700 (PDT), jamesgangnc
wrote:

On Aug 29, 9:16Â*am, Ian wrote:
I need to do some water testing of a skylight assembly that is about 80' above the ground. Â*When I run hoses up the skylight, the pressure drop is so great that I don't get much water flow.

If I can get a pressure washer up to the skylight, can I use it to boost the pressure and increase the volume of water flow? Â*Put another way, can I use it as an auxiliary pumping device to augment flow, or will the low pressure at the intake limit my flow?

Thanks,

Ian

Most power washers don't have much volume. You might be better off
with a regular electric pump.

What he said.
You might drag an empty plastic tub up there and fill it from the
hose.
Take suction off that for the pump.

--Vic

On Aug 29, 6:16*am, Ian wrote:
I need to do some water testing of a skylight assembly that is about 80' above the ground. *When I run hoses up the skylight, the pressure drop is so great that I don't get much water flow.

If I can get a pressure washer up to the skylight, can I use it to boost the pressure and increase the volume of water flow? *Put another way, can I use it as an auxiliary pumping device to augment flow, or will the low pressure at the intake limit my flow?

Thanks,

Ian

80' =~ 35 psi


you need a booster pump fed by the domestic water supply at ground
level at ground level.

Just like how the fire dept uses hydrants to feed a pumper truck to
supply high pressure water to the hoses.

The pump can only supply what ever volume it is supplied.
It can increase pressure but the flow in & out of the pump remains the
same.

On Aug 29, 9:16*am, Ian wrote:
I need to do some water testing of a skylight assembly that is about 80' above the ground. *When I run hoses up the skylight, the pressure drop is so great that I don't get much water flow.

If I can get a pressure washer up to the skylight, can I use it to boost the pressure and increase the volume of water flow? *Put another way, can I use it as an auxiliary pumping device to augment flow, or will the low pressure at the intake limit my flow?

You'd be much better off putting the washer at the BOTTOM or even
somewhere in the middle. Odds are the pump won't kick in on the roof.

How much water do you need for how long? Take a 5 gallon bucket up
there, fill it form the hose and then pour it where you need to test?

On Aug 29, 10:49*pm, Larry Fishel wrote:
How much water do you need for how long? Take a 5 gallon bucket up
there, fill it form the hose and then pour it where you need to test?

+1...

Best advice the OP is ever gonna get on this one...

~~ Evan