I want to buy a water pump for home fire protection. Can you hook a 3/4 inch garden hose to a pump with a 2 inch discharge diameter without hurting the pump, the hose, or changing the pressure too much.

Yrs,

Elrod

What are you going to hook the pump up to, a swimming pool ? What size garden hose, a 1 in, a 3/4 or a 5/8. And of course the pressure will increse as you force the same volume of water though a smaller outlet.

So the answer is maybe, what is the pumps volume, what is the pumps standard pressure at outlet. Is this going to be a cheap walmart hose or a real heavy duty commercial garden hose.

And while the house is burning, you are going to find the pump, hookit up and??
Also you know that the amount of water you can get though a garden hose will have little effect on a larger fire.
If you want, get larger hoses and a larger volume pump if you want some real fire protection ( that is if you have a good water sourse)

Chuck,

The pump is going to be used to put fire blocking gel on the house before I evacuate in front of an advancing brush fire.

The hose is 3/4" garden hose - the best I could find.

I will use two 55 gallon drums, that should be enough to foam all of the house that is not succo or fireproof shingles.

What will happen to the pressure, the pump, and the hose if I hook a 3/4 inch garden hose to a two-inch discharge port on the pump?

Yrs,

Elrod

Just wondering what the owner's / operation manual suggests for the inlet size to be? I would think that if you "starve" the pump it could cause internal damages.

A 3/4'' hose will have up to 135 times as much pressure drop as a 2'' pipe. Think about how long it would take to fill the drums with the 3/4'' hose. Might take about the same time to empty them. If that time is acceptable, you may get away with a smaller pump.

Restricting the intake of a pump can starve it. That is why most pumps come with a bigger intake than discharge.

I have asked to have this moved to plumbing.

A 3/4'' hose will have up to 135 times as much pressure drop as a 2'' pipe. Think about how long it would take to fill the drums with the 3/4'' hose. Might take about the same time to empty them. If that time is acceptable, you may get away with a smaller pump.

Restricting the intake of a pump can starve it. That is why most pumps come with a bigger intake than discharge.

I have asked to have this moved to plumbing.
YES, that's what I said, starving. Just a repost I guess.

To truly protect yourself as you protect your home you need a system similar to what I am providing the public at www.hftfirebuster.com It is primarily used from the water of your pool [doxens of fire engines worth of water in your pool!] but can also be supplied from a fixed storage tank of at least 2500 gallons... again.. just to be SAFE!

You will need a portable fire pump of proper size to create adequate pressure and volume [flow] to properly mix the fire gel as it is being siphoned through an eductor system... as well as fight the often heavy winds associated with a fast moving wildland fire... The manufacturer of the gel should supply an eductor system to meet the minimum specs for pressure and volume...

Feel free to call me anytime (916) 289-4420

www.hftfirebuster.com