Quote:
Originally Posted by russ s
i went to a dual setup with a 5/8 hose and the pumps run better and i get a ton of flow compared to when i first had it hooked to a 3/8 hose ..... i am not saying any bodies way is wrong but i feel like i get better results for me this way
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Running dual pumps is kinda like running dual outboard motors like we do here in Florida.
Some of us go 60 miles offshore, and a motor failure in the summertime thunderstorm season may mean the end of life!
If one motor blows up, you always have the second one to get home with!
What you are experiencing Russ with your dual pumps is no blind "luck".
Your system is based on sound scientific principles.
The principles being two puimps are better then one, and large hose is better then small hose.
End of story.
There is NO hose or dual pump debate.
The flow rate calculator, and the actual experience of many here, has clearly shown large hose and dual pumps to be better.
Another benefit of dual pumps, IF you do not use all the flow, is the dual pumps have an easier life supplying the flow you do need.
While a single pump may be working hard IF you ask for all it's flow, dual pumps can in effect be almost "loafing", so to speak.
This leads to longer pump life.
Larger hose also makes a pump last longer, because it is way less restrictive.
The 45 PSI at 3.6 GPM Shurflo dual pump set up with 5/8 hose was what we suggested years ago on the Delco board.
Even 2 of the 1.8 GPM 60 PSI Shurflo pumps can be combined with great results.
Since the newer Delevan 5800 series pumps have become availiable, we have suggested them in place of the Shurflo's.
Heck, you simply combine what you already have ?
On my old boat, I had a single 110hp Mercruiser.
I would have LOVED to have had dual Yamaha's, but since I already had the Mercruiser, I simply got a second one.
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