Cruisers Forum
 


Join CruisersForum Today

Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on Cruisers Forums. Advertise Here
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 24-01-2020, 15:23   #1
Registered User

Join Date: Aug 2016
Location: In the Atlantic
Boat: Prout Snowgoose 35
Posts: 1,476
Shower drain lower than sump

My boat has quite a large head/bathroom. When showering the whole area will get wet (there is no way to stop that) which is fine.

The original design was for the shower to drain into the bilge. There are also two drain-holes in the floor.

I've installed a sump bearing in mind the bilge is only about 12cm deep. I've added through hull type connectors to the holes in the floor and connected these to the sump. The shower basin drain is also connected to the sump.

Here's the catch. The shower drain is lower than the sump, enough so that the weight of the water will not force it into the sump.

The drain can't be raised, that would be pointless, and the sump can't be lowered.

The only method I can think of to sort this to install a second pump that sucks water out of the shower basin and into the sump. Just need to find a pump small enough and with 19mm inlet and outlet.

Anyhow, just posting here to check I'm not missing out on an easier more efficient method of dealing with this.
__________________

mikedefieslife is offline   Reply With Quote
Old 24-01-2020, 15:32   #2
Registered User

Join Date: Jun 2019
Location: Rochester, NY
Boat: Chris Craft Catalina 381
Posts: 563
Re: Shower drain lower than sump

The easy solution would be a setup like I have. No sump at all. Shower drain feeds to a diaphragm pump that pumps the water directly overboard. There's an on/off switch in the head, so you simply turn the pump on when you start your shower and turn it off at the end. No sump box to clean, takes up less space, has no gravity related issues, etc.
__________________

rslifkin is online now   Reply With Quote
Old 24-01-2020, 15:43   #3
Registered User

Join Date: Jun 2019
Location: Ensenada
Boat: 1970 Willard 36 Trawler
Posts: 723
Re: Shower drain lower than sump

Quote:
Originally Posted by rslifkin View Post
The easy solution would be a setup like I have. No sump at all. Shower drain feeds to a diaphragm pump that pumps the water directly overboard. There's an on/off switch in the head, so you simply turn the pump on when you start your shower and turn it off at the end. No sump box to clean, takes up less space, has no gravity related issues, etc.

I've used a Whale diaphragm pump in this exact configuration for years. I have a small inline filter that needs cleaning every few months. It's noisy when operating, but works fine. I keep a squeegee in the shower to wipe down walls and move water towards the small drain after showering.
mvweebles is offline   Reply With Quote
Old 24-01-2020, 15:48   #4
Registered User

Join Date: Aug 2016
Location: In the Atlantic
Boat: Prout Snowgoose 35
Posts: 1,476
Re: Shower drain lower than sump

That's what I had and just removed. It's not a solution though as there are the multiple drains in the floor.

The whale pump can only deal with one if I'm relying on its suction to remove the water from the shower basin.
mikedefieslife is offline   Reply With Quote
Old 24-01-2020, 15:48   #5
Registered User

Join Date: Jun 2019
Location: Rochester, NY
Boat: Chris Craft Catalina 381
Posts: 563
Re: Shower drain lower than sump

Quote:
Originally Posted by mvweebles View Post
I've used a Whale diaphragm pump in this exact configuration for years. I have a small inline filter that needs cleaning every few months. It's noisy when operating, but works fine. I keep a squeegee in the shower to wipe down walls and move water towards the small drain after showering.
Yup, one of mine is a Whale, the other is an old Par diaphragm pump that's still ticking from 1986 (that's the less used one). The Par has a filter, the Whale doesn't (although I should probably add one). Both are noisy, but effective.
rslifkin is online now   Reply With Quote
Old 24-01-2020, 15:51   #6
Marine Service Provider
 
witzgall's Avatar

Join Date: Oct 2006
Location: Eastern Shore, MD
Boat: Camper Nicholson 44 Ketch
Posts: 1,969
Re: Shower drain lower than sump

This is the product for you: https://www.whalepumps.com/marine/pr...ndlyID=Grey-IC

These pumps are super reliable, and can pass large objects that would clog others. I have this on our sink drain, and a switch on-off version for our shower drain. You could also use this one, which integrates a shower drain: https://www.whalepumps.com/marine/pr...lyID=Gulley-IC

Chris
witzgall is online now   Reply With Quote
Old 26-01-2020, 10:42   #7
Registered User
 
Boatyarddog's Avatar

Join Date: Nov 2014
Location: Olympia, Wa
Boat: 1979 Mariner Ketch 32-(Oberly build) - Hull 202
Posts: 1,044
Images: 2
Re: Shower drain lower than sump

Quote:
Originally Posted by mikedefieslife View Post
My boat has quite a large head/bathroom. When showering the whole area will get wet (there is no way to stop that) which is fine.

The original design was for the shower to drain into the bilge. There are also two drain-holes in the floor.

I've installed a sump bearing in mind the bilge is only about 12cm deep. I've added through hull type connectors to the holes in the floor and connected these to the sump. The shower basin drain is also connected to the sump.

Here's the catch. The shower drain is lower than the sump, enough so that the weight of the water will not force it into the sump.

The drain can't be raised, that would be pointless, and the sump can't be lowered.

The only method I can think of to sort this to install a second pump that sucks water out of the shower basin and into the sump. Just need to find a pump small enough and with 19mm inlet and outlet.

Anyhow, just posting here to check I'm not missing out on an easier more efficient method of dealing with this.
How about just connecting a water pump diaphragm type would be best, and leave it on continuously while showering.
You only need to plumb to the pump and tank or OVBRD.
Ceers
SV Cloud Duster
Boatyarddog is offline   Reply With Quote
Old 26-01-2020, 10:45   #8
Registered User
 
Boatyarddog's Avatar

Join Date: Nov 2014
Location: Olympia, Wa
Boat: 1979 Mariner Ketch 32-(Oberly build) - Hull 202
Posts: 1,044
Images: 2
Re: Shower drain lower than sump

Quote:
Originally Posted by mikedefieslife View Post
That's what I had and just removed. It's not a solution though as there are the multiple drains in the floor.

The whale pump can only deal with one if I'm relying on its suction to remove the water from the shower basin.
If that's so then you should install y valves possibly two to remedy. Or possibly a Collector for those drains.
The pump will pump faster than your drains will drain.
DO NOT USE A FILTER unless you can easily remove and clean it!
SV Cloud Duster
Boatyarddog is offline   Reply With Quote
Old 26-01-2020, 17:25   #9
Registered User

Join Date: Aug 2007
Location: Adelaide, South Australia, sailing in the Med.
Boat: Beneteau, Oceanis 50
Posts: 694
Re: Shower drain lower than sump

Quote:
Originally Posted by mikedefieslife View Post
My boat has quite a large head/bathroom. When showering the whole area will get wet (there is no way to stop that) which is fine.

The original design was for the shower to drain into the bilge. There are also two drain-holes in the floor.

I've installed a sump bearing in mind the bilge is only about 12cm deep. I've added through hull type connectors to the holes in the floor and connected these to the sump. The shower basin drain is also connected to the sump.

Here's the catch. The shower drain is lower than the sump, enough so that the weight of the water will not force it into the sump.

The drain can't be raised, that would be pointless, and the sump can't be lowered.

The only method I can think of to sort this to install a second pump that sucks water out of the shower basin and into the sump. Just need to find a pump small enough and with 19mm inlet and outlet.

Anyhow, just posting here to check I'm not missing out on an easier more efficient method of dealing with this.
Boats like Beneteau have been doing this for years. You just need a gulper pump (diaphragm), with a push button in the shower, and a timer circuit to make the pump run for several seconds each time you push the button. The grey water is then pumped straight over the side, or into a holding tank with gravity and deck-suction emptying.
Running grey water (or any water) into the bilge is not a great idea.
David B is offline   Reply With Quote
Old 26-01-2020, 20:52   #10
Registered User

Join Date: Aug 2016
Location: In the Atlantic
Boat: Prout Snowgoose 35
Posts: 1,476
Re: Shower drain lower than sump

I already have the Whale Gulper 220.

What i've done now is connect all the drain holes in the floor to drain into the sump box, then the Whale pumping water from the shower drain into the sump box. The sump box is has an automatic pump that pumps overboard.

The whale can easily overwhelm the sump box, but if left turned on whilst showering its not a problem.

I've also connect a y piece with two taps to the Whale to also allow me to drain anything that ever might collect in the bilge.

Now I just need to seal up all the other holes in the floor and around all the pipes. I also need a way create a water tight seal for the cut out hatch in the floor where the sump box lives. I would just sikaflex it up but I'm going to want occasional access.

It's all a bit convoluted but works. Things like this really annoy me, when manufacturers either lack the foresight, or willingness to get things right first time. I should add the previous owners to that too.

By the way, the area of the bilge I had to fit the sump box and all the pipe work is about the size of a lunch box.
mikedefieslife is offline   Reply With Quote
Old 26-01-2020, 21:38   #11
Registered User

Join Date: May 2010
Location: Sydney Australia
Boat: Fisher pilothouse sloop 32'
Posts: 1,719
Re: Shower drain lower than sump

Quote:
Originally Posted by mikedefieslife View Post
I already have the Whale Gulper 220.

What i've done now is connect all the drain holes in the floor to drain into the sump box, then the Whale pumping water from the shower drain into the sump box. The sump box is has an automatic pump that pumps overboard.

The whale can easily overwhelm the sump box, but if left turned on whilst showering its not a problem.

I've also connect a y piece with two taps to the Whale to also allow me to drain anything that ever might collect in the bilge.

Now I just need to seal up all the other holes in the floor and around all the pipes. I also need a way create a water tight seal for the cut out hatch in the floor where the sump box lives. I would just sikaflex it up but I'm going to want occasional access.

It's all a bit convoluted but works. Things like this really annoy me, when manufacturers either lack the foresight, or willingness to get things right first time. I should add the previous owners to that too.

By the way, the area of the bilge I had to fit the sump box and all the pipe work is about the size of a lunch box.

Hi, the hatch in the floor can easily be sealed by applying a thick bead of silicone,( yes I know silicone should never be used on a boat ) and applying a grease film (vaseline works well) to the lid where it will come into contact with the silicone when fitted and anywhere adhesion is not required, sit the lid onto the wet silicone making sure it is not fastened down and sitting a little proud of and even to the surrounding sole (or floor if you prefer to call it that) and allow to cure overnight. When cured fasten down securely flush to the surround, you now have a readily removable cover that has an inbuilt flexible seal.
__________________
Rob aka Uncle Bob Sydney Australia.

Life is 10% the cards you are dealt, 90% how you play em
Uncle Bob is online now   Reply With Quote
Old 01-02-2020, 21:24   #12
Registered User
 
Rowglide's Avatar

Join Date: Jan 2017
Location: Kingston, Ontario
Boat: Hans Christian 43
Posts: 301
Re: Shower drain lower than sump

If you want a serious pump for this job, I have a brand new Jabsco belt driven diaphragm pump listed in the classified ads right now
__________________

Rowglide is offline   Reply With Quote
Reply

Tags
shower

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Reroute shower sump drain jkimbu Plumbing Systems and Fixtures 9 13-02-2018 21:55
Shower Sump Pump on 44' Center Cockpit valhalla II Plumbing Systems and Fixtures 7 11-12-2011 21:20
Shower Sump Windblown Plumbing Systems and Fixtures 30 08-06-2010 23:33
Shower sump system captain465 Classifieds Archive 2 12-06-2009 17:54
Best Grey Water/Shower Sump System! Pelagic Plumbing Systems and Fixtures 25 14-09-2008 21:26

Advertise Here


All times are GMT -7. The time now is 19:26.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.