water pump instulation

nickysc

nickysc

New Member
Jul 1, 2007
581
Springfield SC
Boat Info
270se sundancer
Engines
7.4mpi w/BravoIII
I'm wanting to put a water pump in my boat to wash down the mess from fishing, kids etc. I was thinking about putting a T in the line that lets the sewage out of the bottom of the boat, Maby mounting the pump down low, below the water level. Maby plumbing hard line,(pvc) up to the cabinet starboard stern, then placeing water hose in cabinet, along with a switch to turn on pump. Has anybody ever done this, will that work,If not what can I do to get good water presure for a wash down hose. Thanks Nicky
 
I was thinking about a similar installation. I have a shore water inlet line and I was thinking about removing the check valve and reversing the flow using the same lines. I'd have to remove the end, but this way I could use onboard water. We are never near a marina to use the shore water, so it's kind of a waste.

The other option would be to T into the inbound seacock for the toilet. That seacock is in the mid-cabin so it would be a pretty good run to the back where the pump would be.


Can anybody recommend a good pump to use for washdown purposes?
 
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I am wanting to pull water in from the lake,river, etc. Not use my fresh water supply.
 
The best systems for this(especially those that boat in fresh water only) are those that can either pull off of the fresh water intake directly or through your freah water system.

Go to Heatercraft.com and pick out the one that works best.
 
Keep in mind Im a "newbie" BUT.......Is modifing that sewage outlet line in any way a good idea? On fresh water in central South Carolina seems that by law that outlet should be locked or at least strapped closed at all times & on my 250 the valve is at the absolute bottom of the hose. Im probably missing something here but Im just wondering.
 
Is modifying that sewage outlet line in any way a good idea?...NO!!!, I'm probably missing something here but I'm just wondering....MWPH IS NOT MISSING ANYTHING!!!...if you try to use that line to feed a fresh water wash down it won't be too fresh, as the water coming through that line will create a vacuum and you will empty your holding tank all over your deck... don't think so, well just try it and let us know how you make out
 
My 380 Sundancer has a 200' all-chain rode.

My first season had me cleaning the chain locker over and over again.

Prior to the second season launch, I drilled a through hull, added a seacock, strainer and pump. The through hull is back near the engines and gen intakes. The strainer is on the stringer near that for the gen.

The pump is wired to only have power when the windlass is powered.

The bow washdown is a removable flat deck plate w/ a coiled hose below.

It works great!

I just hang out at the bow when raising the chain and clean it once out of the water. I've yet to run out of water.

No problem running the hose to the bow. I followed all the starboard stuff. It was easy to access.
 
nickysc said:
I'm wanting to put a water pump in my boat to wash down the mess from fishing, kids etc. I was thinking about putting a T in the line that lets the sewage out of the bottom of the boat, Maby mounting the pump down low, below the water level. Maby plumbing hard line,(pvc) up to the cabinet starboard stern, then placeing water hose in cabinet, along with a switch to turn on pump. Has anybody ever done this, will that work,If not what can I do to get good water presure for a wash down hose. Thanks Nicky
Click to expand...

The raw water wash down pumps are very nice additions, but T'ing into the sewage line is a "crappy" idea :smt001. Yuck. A thru-hull is not that difficult to install.
 
I think the title of this thread should have been water pump inSTOOLation.
 
Yeah. If spraying the deck down with the contents or even remnants of your holding tank will 'clean it up', it must be pretty dirty.
 
I have just added a pump and T to the inlet for the AC pump. This is working out great. My concern was that when having both running, they would both pull too much and starve the AC pump. I have not even seen the slightest slowdown when running both. I also tied into the fresh water power, so when I turn on the fresh water it powers them both up at once. Both pumps are pressure switched, so when they prime up they stop...

My t is before the strainer... The pump has a quick disconnect and screen....

I would not T into anything for your waste dump...

My kids can shoot water 60 feet and it never runs out. My friends were joking that I should get a red flashing light and backup the fire department with it!!!

Good luck!!!!
 
I kind of just went through this my self. I went off shore fishing so I added to extra pumps. One was for wash down (did not want to use all my fresh water) and one for the live well. Both were rule pumps available from boatersworld. They can be through-hull or transom mounted. Because I have 2 through-hull fitting already (one for ac and one for gen-set) I t'ed off the ac inlet. Had I not had that available I would have transom mounted it under my swim deck.:thumbsup:
 
Thanks for all the info, as well as openions. I was considering the ac line but was worried about starving the ac of water. Since this has been done with out any problems I will use it rather than the sewer line, how ever I never dump out of this line, we always pump out the top. But any way I like the AC option much better! Thanks everyone Nicky
 
This thread just inspired me to install a raw water washdown in my 280 Sundancer. I'm going to tap into the AC inlet line as everyone mentioned and install the nozzle and hose in my transom locker. Great idea!
 
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