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Old 01-26-2014, 09:46 PM   #1
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Pressure water pump

Hey everyone, we've came across a dilemma since buying N4712. The pressure water pump, it's slow as molasses, it's pumping rate is 2.7 GPM which is not enough if we want to wash dishes and take a shower at the same time. So after looking around I've came across this 110v pump by make of Head Hunter and the model is Mach V. Anyone ever used one of these, or have any experience with them?
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Old 01-26-2014, 10:07 PM   #2
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No experience with that pump. How many outlets does the boat have?

I'd look at a pump that is 12V/24V (whatever your DC system is) so you're not tapping off the 110v system for your domestic water- unless your system is already 110v.

In addition to the rated GPM, look at the PSI. We have a 5.7 GPM/55PSI Shurflo on our boat, and we have great pressure everywhere.
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Old 01-26-2014, 10:13 PM   #3
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No experience with that pump. How many outlets does the boat have? I'd look at a pump that is 12V/24V (whatever your DC system is) so you're not tapping off the 110v system for your domestic water- unless your system is already 110v. In addition to the rated GPM, look at the PSI. We have a 5.7 GPM/55PSI Shurflo on our boat, and we have great pressure everywhere.
Oh ok. Our current system is 12v, we have 8 various things on the fresh water system (plus the two heads).
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Old 01-26-2014, 10:40 PM   #4
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http://www.shurflo.com/files/Educati...-1201%2011.pdf

Have a look at this one Oliver. We had a similar issue on our tug and I'm very happy with this. I did have to upsize my shower sump to keep up with the increased flow but not a big deal.
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Old 01-26-2014, 11:18 PM   #5
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http://www.shurflo.com/files/Educati...-1201%2011.pdf Have a look at this one Oliver. We had a similar issue on our tug and I'm very happy with this. I did have to upsize my shower sump to keep up with the increased flow but not a big deal.
Thanks I'll take a look!
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Old 01-27-2014, 12:24 AM   #6
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http://www.shurflo.com/files/Educati...-1201%2011.pdf

Have a look at this one Oliver. We had a similar issue on our tug and I'm very happy with this. I did have to upsize my shower sump to keep up with the increased flow but not a big deal.
The ShurFlo 5.7 5901-1201/1211 was discontinued several years ago due to repeated failures, including ours. The replacement is 5900-0201/0211....
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Old 01-27-2014, 12:33 AM   #7
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Thanks for pointing that out. It appears I somehow attached the wrong link??? The one I installed was 12v and not 24. My bad
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Old 01-27-2014, 05:39 AM   #8
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On my boat I have 2 x 2.7 gal/min pumps hooked up in series, the idea being if 1 fails I just power up the other and we're back in business. I sometimes turn both on and have a good hard shower.
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Old 01-27-2014, 06:10 AM   #9
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Anyone ever used one of these, or have any experience with them?
We have a pair of them on a 100 footer the chief mate manages. They are excellent pumps, very quiet and supply all the water anyone would desire at great pressure, it is as if the fixtures were connected to city water.

There is a pair of them for redundancy, only one is online at a time.
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Old 01-27-2014, 08:39 AM   #10
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On my boat I have 2 x 2.7 gal/min pumps hooked up in series, the idea being if 1 fails I just power up the other and we're back in business. I sometimes turn both on and have a good hard shower.

So there is no issue with free flowing water through the unpowered pump? i had considered a similar set up. I never actually did it so i didn't read up to see if that was a problem.

The one that was using had a pressure adjusting screw on the pump head. I cranked it up and got acceptable results. I don't remember the model or even the brand.
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Old 01-27-2014, 08:54 AM   #11
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So there is no issue with free flowing water through the unpowered pump? i had considered a similar set up. I never actually did it so i didn't read up to see if that was a problem.

The one that was using had a pressure adjusting screw on the pump head. I cranked it up and got acceptable results. I don't remember the model or even the brand.
I would think connecting them in parallel would be a better solution if one wanted a "backup". Install valves and a swith to use either.

Unless one has 120 volts AC at all times on the boat, a 12 volt pump (assuming a 12 volt DC system) would be a better plan. You don't want to have to fire up a genset just to wash your hands.
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Old 01-27-2014, 10:12 AM   #12
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I would think connecting them in parallel would be a better solution if one wanted a "backup". Install valves and a swith to use either. Unless one has 120 volts AC at all times on the boat, a 12 volt pump (assuming a 12 volt DC system) would be a better plan. You don't want to have to fire up a genset just to wash your hands.
Well have 120v all the time. I'm going price around. After further reading it's a quiet and reliable pump so I think we may have found our solution.
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Old 01-27-2014, 10:41 AM   #13
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Oliver, a good friend of mine has a Mach V on his 72 foot sport fish boat. When it works it's a heck of a pump. The problem is that he had problems with the pump and wasn't happy with the help he received from Head Hunter.

On the plus side, Head Hunter is close to you. If you have a problem you can just take it right to the factory for repair.

Take a look at the Groco pumps. I really like the type of pump head they use. It's a positive displacement pump that is very reliable and easy to repair if you ever need to. I have the JR version on my boat. It's over twenty years old and still going strong.

Pumps - PJRW - PSRW
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Old 01-27-2014, 11:08 AM   #14
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Oliver, a good friend of mine has a Mach V on his 72 foot sport fish boat. When it works it's a heck of a pump. The problem is that he had problems with the pump and wasn't happy with the help he received from Head Hunter.

On the plus side, Head Hunter is close to you. If you have a problem you can just take it right to the factory for repair.

Take a look at the Groco pumps. I really like the type of pump head they use. It's a positive displacement pump that is very reliable and easy to repair if you ever need to. I have the JR version on my boat. It's over twenty years old and still going strong.

Pumps - PJRW - PSRW
Parks, thank you for the reply. I'll take a look at the link. The main reason i'm looking at this specific pump is because its 115v which i already ran down an over sized wire for the UV Filter which i could tap into. Also we have a lot of amperage pull on the 12v side even with LED's the electronics still draw a butt load, and the main feed wire for the panel is a little small in my opinion. So im trying to push away the 12v and goto the 120 which normally has a very small load on it.
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Old 01-27-2014, 12:42 PM   #15
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Parks, thank you for the reply. I'll take a look at the link. The main reason i'm looking at this specific pump is because its 115v which i already ran down an over sized wire for the UV Filter which i could tap into. Also we have a lot of amperage pull on the 12v side even with LED's the electronics still draw a butt load, and the main feed wire for the panel is a little small in my opinion. So im trying to push away the 12v and goto the 120 which normally has a very small load on it.
We have a 24 volt shurflo and an a/c headhunter Mach 5 running in parallel (throw a breaker and switch 2 valves and you are in business). Just make sure all the specs regarding pressure etc are fine for everything downstream. You may need to add a pressure regulator and perhaps an accumulator to get the results you need. Both of our pumps draw 10 amps and top out at around 65psi with max flow around 20 gpm. You need a pretty big sterilizer to keep up with these pumps and some water makers don't like flushing with 65psi so plan accordingly.

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Old 01-27-2014, 01:03 PM   #16
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make sure your water lines and connections can take the higher pressure.
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Old 01-27-2014, 01:08 PM   #17
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I use a small 240v domestic pressure pump powered off the inverter as our standard pump (240v is the usual supply here in Oz, like 110v is States-side). The original 12v pump, while well-sized, is noisy so I keep it in reserve, plumbed in parallel and ready to go anytime. The AC unit is not only quieter, but much cheaper to buy and IMHO better built. I like having two pumps, one on AC and the other on DC, as double redundancy. As you have a working DC pump, albeit a bit under-sized, I'd leave it in place and go for your 110v AC pump as your main.
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Old 01-27-2014, 01:40 PM   #18
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We have a 24 volt shurflo and an a/c headhunter Mach 5 running in parallel (throw a breaker and switch 2 valves and you are in business). Just make sure all the specs regarding pressure etc are fine for everything downstream. You may need to add a pressure regulator and perhaps an accumulator to get the results you need. Both of our pumps draw 10 amps and top out at around 65psi with max flow around 20 gpm. You need a pretty big sterilizer to keep up with these pumps and some water makers don't like flushing with 65psi so plan accordingly. Via iPad using Trawler
Thanks for the input. Our whale fittings should be just fine with the pressure. We don't have a water-maker so I don't have to worry. the problem is that our UV filter is rated for 8 GPM, so we'll have figure something out there.
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Old 01-27-2014, 01:41 PM   #19
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I use a small 240v domestic pressure pump powered off the inverter as our standard pump (240v is the usual supply here in Oz, like 110v is States-side). The original 12v pump, while well-sized, is noisy so I keep it in reserve, plumbed in parallel and ready to go anytime. The AC unit is not only quieter, but much cheaper to buy and IMHO better built. I like having two pumps, one on AC and the other on DC, as double redundancy. As you have a working DC pump, albeit a bit under-sized, I'd leave it in place and go for your 110v AC pump as your main.
Thats what we were going do so we have double redundancy. thanks for the input.
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Old 01-27-2014, 01:43 PM   #20
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make sure your water lines and connections can take the higher pressure.
Heres the specs, they should be just fine.
Fittings are made from Glass-filled Polypropylene
WhaleX Piping is made from Polyethylene
15 mm, Whalex Red Tubing:
Designed for Hot water lines
Maximum hot water pressure is 90 psi
Maximum hot water temp is 150 degrees F / 65 C
15 mm, Whalex Blue Tubing:
Designed for Cold water lines
Maximum cold water pressure is 180 psi
Maximum cold water temp is 68 degrees F / 20 C
Minimum bend radius is 2.95 inches
Standard Whale 15mm Tubing is made from medium density polyethylene, and the WhaleX is made from high-density polyethylene. They both have the same temperature and pressure rating for sustained use, but we test the Whalex tubing to withstand 3x its rated pressure (2x for the standard tubing).
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