Welcome to Carver Yachts Owners Forum

We are a boating forum for owners of Carver Yachts to enthusiastically discuss all aspects of Carver Boat ownership. Whether you are looking for your first Carver or currently own one, you are sure to feel at home on CarverYachtOwners.com

You are currently viewing our board as a guest which gives you limited access to view most discussions, articles and access our other FREE features. By joining our free community you will have access to searching the forum topics, post topics, communicate privately with other members (PM), respond to polls, upload your own photos and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!

Vacuflush Lake Water Draw Advice

ImageIf you have a project idea or a completed one you would like to show off (major or minor), share it with the rest of us!
User avatar

Topic author Canada
Midnightsun
CYO Supporter
CYO Supporter
Posts: 622
Joined: March 27th, 2016, 2:27 pm
Vessel Info: The Midnight Sun
2007 41CMY
Volvo D6-370's
Location: Montreal, Canada
Has thanked: 53 times
Been thanked: 217 times

Vacuflush Lake Water Draw Advice

Postby Midnightsun » April 28th, 2018, 8:09 am

There are only a few things that make us go back to port and one of them is running out of fresh water. Not so much so because we have no water since our water is almost drinking water but because the heads will not flush without water in the potable water tank. That being said, the heads take their water from the potable water tank pressurized supply and I would like to draw from the lake instead. I do have my washdown pump which already gives me this feature so basically rerouting the head water intake line to the washdown line sounds like a simple solution right? Anyone see any issues by doing this except that the washdown breaker needs to be on when using the head?
Cheers, Hans
2007 Carver 41 CMY
Twin Volvo D6-370's
Montreal, Canada
Midnight Sun I Photos

User avatar

Topic author Canada
Midnightsun
CYO Supporter
CYO Supporter
Posts: 622
Joined: March 27th, 2016, 2:27 pm
Vessel Info: The Midnight Sun
2007 41CMY
Volvo D6-370's
Location: Montreal, Canada
Has thanked: 53 times
Been thanked: 217 times

Re: Vacuflush Lake Water Draw Advice

Postby Midnightsun » April 28th, 2018, 8:24 am

Hmmm, got me thinking here. Probably better if I simply T off anywhere into the main pressurized water supply from the washdown circuit and install a solenoid to supply as required. Shutting off the potable water pump breaker, turn on the washdown breaker and activating the solenoid valve now supplies lake water throughout the entire boat without using any tank water or affecting the cleanliness of the potable water tank due to the check valve in the pump. Yep, think I will go this route as it gives much more flexibility to water supply overall. Activating the lake water supply when we do dishes comes to mind as lots of water wasted there not to mention showers in the morning!! Probably install a whole house carbon/sediment filter on this line as well even though I have one at the kitchen faucet already. Anyone see any issues here?
Cheers, Hans
2007 Carver 41 CMY
Twin Volvo D6-370's
Montreal, Canada
Midnight Sun I Photos
User avatar

Canada
Viper
Admiral
Admiral
Posts: 2443
Joined: July 10th, 2015, 9:58 pm
Vessel Info: 1989 Carver 3807
Location: Ontario, Canada
Has thanked: 102 times
Been thanked: 491 times

Re: Vacuflush Lake Water Draw Advice

Postby Viper » April 28th, 2018, 9:10 am

Personally I would keep both systems separate. The easiest solution if you want to use raw water is your first one to tee into the raw water wash-down. The downside is that raw water produces more holding tank odours and the same can be said about the standing raw water that will always be in your bowls, for those reasons, a fresh water flush is considered an upgrade. I know you can add filters but that's yet another item to maintain, and if the waters you're in have a degree of salt, I'd contact Dometic to ensure that won't affect system components. It may be fine, I've just never had to look into that before. If there's room for one, have you considered adding another water tank?
User avatar

Topic author Canada
Midnightsun
CYO Supporter
CYO Supporter
Posts: 622
Joined: March 27th, 2016, 2:27 pm
Vessel Info: The Midnight Sun
2007 41CMY
Volvo D6-370's
Location: Montreal, Canada
Has thanked: 53 times
Been thanked: 217 times

Re: Vacuflush Lake Water Draw Advice

Postby Midnightsun » April 28th, 2018, 9:39 am

Another water tank will run out eventually. I doubt I could ever drain the Great Lakes though. :lol:
Cheers, Hans
2007 Carver 41 CMY
Twin Volvo D6-370's
Montreal, Canada
Midnight Sun I Photos
User avatar

Canada
bud37
Admiral
Admiral
Posts: 1668
Joined: April 23rd, 2015, 10:22 pm
Has thanked: 234 times
Been thanked: 338 times

Re: Vacuflush Lake Water Draw Advice

Postby bud37 » April 28th, 2018, 10:47 am

Don't forget a couple of check valves in the appropriate spots to prevent unwanted back feed and siphoning.....watch your levels, don't want to sink the boat....maybe check to see if this raw water feed to sinks and main tank is an option on any boats...not saying it won't work, really don't know at this point, it seems fairly straight forward and would be handy to have this capability.
User avatar

Topic author Canada
Midnightsun
CYO Supporter
CYO Supporter
Posts: 622
Joined: March 27th, 2016, 2:27 pm
Vessel Info: The Midnight Sun
2007 41CMY
Volvo D6-370's
Location: Montreal, Canada
Has thanked: 53 times
Been thanked: 217 times

Re: Vacuflush Lake Water Draw Advice

Postby Midnightsun » May 5th, 2018, 8:37 pm

Took a look at the installation difficulty today. Wash down pump is right beside my water pump and potable water tank so this will be easy. Another project that is going to happen. :-D
Cheers, Hans
2007 Carver 41 CMY
Twin Volvo D6-370's
Montreal, Canada
Midnight Sun I Photos
User avatar

Topic author Canada
Midnightsun
CYO Supporter
CYO Supporter
Posts: 622
Joined: March 27th, 2016, 2:27 pm
Vessel Info: The Midnight Sun
2007 41CMY
Volvo D6-370's
Location: Montreal, Canada
Has thanked: 53 times
Been thanked: 217 times

Re: Vacuflush Lake Water Draw Advice

Postby Midnightsun » May 12th, 2018, 4:53 am

Decided to interconnect the entire system to supply lake water on demand. Will be installing a 5a breaker in the conveniently unused location under the washdown pump breaker and relabel to "interconnect". Need to shut off the potable water pump and turn on the washdown pump when activating so the location for this is really ideal. May install a small led reminder light in the galley in case we forget to deactivate the interconnect which is easily connected to the wire powering the solenoid.

Keep in mind the waters I boat in are really pristine and I would say drinkable in a bind. Would not recommend this modification in bad waters or salt water just like I would not activate it if I wander into bad areas and would refrain from using it in Marinas or other doubtful areas. This will mostly be used to save potable water when taking showers at times when we are away for several days. The main goal here is to not need to return to port because we are low on water and cannot flush the head. Bottom line this will be used infrequently but in place if needed.

Image
Cheers, Hans
2007 Carver 41 CMY
Twin Volvo D6-370's
Montreal, Canada
Midnight Sun I Photos

United States of America
tomschauer
CYO Supporter
CYO Supporter
Posts: 1012
Joined: March 28th, 2016, 10:52 pm
Vessel Info: 1998 Carver 355
Suspicious Fishes !
1990 Proline 17CC
Location: upper chesapeake bay
Has thanked: 76 times
Been thanked: 209 times

Re: Vacuflush Lake Water Draw Advice

Postby tomschauer » May 14th, 2018, 8:06 pm

I wouldn't even use our bay water to flush my toilet, let alone shower in. It is far from pristine.
Maybe some day.....
User avatar

Topic author Canada
Midnightsun
CYO Supporter
CYO Supporter
Posts: 622
Joined: March 27th, 2016, 2:27 pm
Vessel Info: The Midnight Sun
2007 41CMY
Volvo D6-370's
Location: Montreal, Canada
Has thanked: 53 times
Been thanked: 217 times

Re: Vacuflush Lake Water Draw Advice

Postby Midnightsun » May 17th, 2018, 9:01 am

Started a new thread on the modification, see here. viewtopic.php?f=13&t=3204&p=20764#p20764
Cheers, Hans
2007 Carver 41 CMY
Twin Volvo D6-370's
Montreal, Canada
Midnight Sun I Photos

Return to “The Project Center”



Who is online

Users browsing this forum: No registered users and 1 guest