Bilge pump set-up help

Page  <12
Post Options Post Options   Likes (0) Likes(0)   Quote Pcj Quote  Post ReplyReply Direct Link To This Post Posted: 17 Sep 2022 at 1:35am
Pcj View Drop Down
Platinum
Platinum
Avatar

Joined: 27 Nov 2019
Location: papakura
Status: Offline
Points: 1986
same about 1/2 way, test by filling up bilge and pumped out ok.only 1 metre from pump to outlet
Amateur's built the ark. Professional built the Titanic
Back to Top
Post Options Post Options   Likes (0) Likes(0)   Quote Big -Dave Quote  Post ReplyReply Direct Link To This Post Posted: 17 Sep 2022 at 7:26am
Big -Dave View Drop Down
Titanium
Titanium
Avatar

Joined: 05 Aug 2009
Location: Hamilton
Status: Offline
Points: 3093
I would only do this on an auto pump, as if you get a bit of crud under the non return valve, it is rendered useless.and with a manually switched pump, you wouldn't notice your bilge filling up.
Also, it is a valid point that bilge pumps develop very little pressure, it might struggle to overcome a head of water above the valve when combined with the spring pressure.
What about a little rubber flap over the outlet?
Or could the bilge pump delivery pipe be routed higher than the outlet before dropping to the outlet, this would minimise any waterline induced back flow.
Any restriction in that pipe is a potential blockage, and will reduce pump performance.
you can't fix an idiot with duct tape, but it does muffle them for a while...
Back to Top
Post Options Post Options   Likes (0) Likes(0)   Quote Pcj Quote  Post ReplyReply Direct Link To This Post Posted: 17 Sep 2022 at 8:48am
Pcj View Drop Down
Platinum
Platinum
Avatar

Joined: 27 Nov 2019
Location: papakura
Status: Offline
Points: 1986
https://www.burnsco.co.nz/boating/plumbing/fittings-valves/plumbing-valves/trudesign-non-return-valve

fitted 19mm and filled bilge and no issues. Yes I thought the same re head and pressure,can get them with a ball in them,had one in the yacht no issue,my rise is only about 500mm pump is good for 1200 head so it says
Amateur's built the ark. Professional built the Titanic
Back to Top
Post Options Post Options   Likes (1) Likes(1)   Quote krow Quote  Post ReplyReply Direct Link To This Post Posted: 18 Sep 2022 at 7:17pm
krow View Drop Down
Titanium
Titanium
Avatar

Joined: 02 Aug 2007
Location: Whangarei
Status: Offline
Points: 6213
I would fill up the head above the valve and retest. Note though the valve can "stick" a bit. I find all good for the day once started.

Back to Top
Post Options Post Options   Likes (0) Likes(0)   Quote Big -Dave Quote  Post ReplyReply Direct Link To This Post Posted: 19 Sep 2022 at 6:02am
Big -Dave View Drop Down
Titanium
Titanium
Avatar

Joined: 05 Aug 2009
Location: Hamilton
Status: Offline
Points: 3093
1200 is probably the gallons per hour rate.
So long as you have tested, no problem...
you can't fix an idiot with duct tape, but it does muffle them for a while...
Back to Top
Post Options Post Options   Likes (0) Likes(0)   Quote OneWayTraffic Quote  Post ReplyReply Direct Link To This Post Posted: 19 Sep 2022 at 10:20pm
OneWayTraffic View Drop Down
Platinum
Platinum
Avatar

Joined: 19 Jan 2013
Location: Amberley
Status: Offline
Points: 2654
All this reminds me of the circles I went in with my build. Seal up everything, fill with foam or leave holes for inspection, knowing water might get in?

In the end I went with enough foam to float the boat no matter what and limbers with inspection/ventilation holes. I have tucked all the inspection openings away from where most water will get in, and all the openings are in places where water would not usually sit. 

If that boat was mine I'd reseal the bungs and be done with it. Remove bungs, look for any evidence of wet wood, dry well and reinstall and reseal. I'd epoxy the bung hole and screw holes as well. 

If I had any doubts about water getting in unseen I'd cut out an inspection hole in the sole near the back, seal the edges with epoxy and put in an inspection port. This could be as simple as a clear perspex square screwed into place and sealed with marine gasket sealant. Removal may not ever be required, but you will have peace of mind. 

I'd not muck around with pumps in that space. 
Back to Top
Page  <12
Forum Jump
Forum Permissions View Drop Down


This page was generated in 0.160 seconds.

Fishing Reports Visit Reports

Raglan Fishing Report - 22/09/22

Big snapper turn up on west coast With springtime here, the big snapper have turned... Read More >

Canterbury Fishing Report - 22/09/22

Salmon action at Kaikoura Once again, the weather has been settled over the past two... Read More >

Turangi - Taupo Fishing Report - 22/09/22

Tongariro Floods clearing away the snags We have had yet another big flood come through... Read More >

Tauranga Fishing Report - 22/09/22

Deep water species few and far between Regrettably, there’s not a lot happening with the... Read More >

Fishing bite times Fishing bite times

Major Bites

Minor Bites

Major Bites

Minor Bites