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Blackwater pumpout question
- KyleR
- CYO Supporter
- Posts: 217
- Joined: July 8th, 2022, 10:50 am
- Vessel Info: MV Verity
2002 Carver 396
Twin Cummins 6BTA 370HP - Location: On the move!
- Has thanked: 83 times
- Been thanked: 63 times
Blackwater pumpout question
Unfortunately we do not have the installed option to pump directly overboard and I don't really have the time to add an overboard discharge system in the time frame I'm working with.
As such, I started looking around and ran across the following:
https://www.blackwaterbazooka.com/
Seems like an interesting concept in that you can just connect it to your pumpout fitting, drop the discharge hose overboard, hookup electricity and start pumping. (Yes, I'm aware of the 3-mile rule and no discharge zones - this based on the assumption that I'm in an area where overboard discharge is allowed.)
Anyone ever use anything like this or have any other suggestions? My initial concerns are:
1. The discharge hose looks a little small in this particular design, however the pump does macerate so maybe that's not a big deal?
2. It says the pump generates 5ft of suction head, but with the blackwater tanks in the bilge and the pumpout connection on the topside deck, I'm not sure if this will generate the lift necessary to adequately pump out the tank. Thoughts?
If anyone has any other suggestions I'm all ears! Thanks in advance!!
Kyle
2002 Carver 396
Twin Cummins 6BTA 370HP
- waybomb
- CYO Moderator
- Posts: 2408
- Joined: February 5th, 2013, 9:24 pm
- Vessel Info: 1995 Boston Whaler Rage15
1987 3697 Carver Mariner
1988 Cougar 46 Kevlar Vee offshore
1969 15' Glasspar / 1967 Johnson Electromatic 85
1996 Boston Whaler Rage 15 - Location: Saint Joseph,Mi
- Has thanked: 50 times
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Re: Blackwater pumpout question
Fred
1969 Glaspar Avalon /1969 Johnson Electromatic 85
1987 Carver Mariner
1988 Cougar Kevlar 46' with triple blown 572 ci
1995 Boston Whaler Rage
Past - 1988 2807, 1989 4207 Aft
- Midnightsun
- CYO Supporter
- Posts: 2851
- Joined: March 27th, 2016, 2:27 pm
- Vessel Info: The Midnight Sun
2007 41CMY
Volvo D6-370's - Location: Montreal, Canada
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Re: Blackwater pumpout question
Looks like the fresh water hook up does the cleaning. I would think the investment would barely pay for itself if this is only going to be used for the Bahamas trip.
- KyleR
- CYO Supporter
- Posts: 217
- Joined: July 8th, 2022, 10:50 am
- Vessel Info: MV Verity
2002 Carver 396
Twin Cummins 6BTA 370HP - Location: On the move!
- Has thanked: 83 times
- Been thanked: 63 times
Re: Blackwater pumpout question
I would probably build my own knock-off version. Thinking of using a Whale Urchin manual pump and assorted fittings. Probably under $150 all in. Definitely has its pitfalls but would give some flexibility if we couldn't find a reasonably priced pumpout spot.
2002 Carver 396
Twin Cummins 6BTA 370HP
- paulr
- Scurvy Dog
- Posts: 48
- Joined: September 27th, 2022, 9:36 pm
- Vessel Info: 396 CY Aft Cabin 2001 8.1 Crusaders
- Location: South Jersey, LBI
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Re: Blackwater pumpout question
- KyleR
- CYO Supporter
- Posts: 217
- Joined: July 8th, 2022, 10:50 am
- Vessel Info: MV Verity
2002 Carver 396
Twin Cummins 6BTA 370HP - Location: On the move!
- Has thanked: 83 times
- Been thanked: 63 times
Re: Blackwater pumpout question
I have a hard enough time pumping out the 396 Carver at the pump out station which has significant vacuum.
Thanks Paul. I had similar experiences early on so I checked the blackwater tank vent filters and found them completely blocked. Both filters! I removed them and hooked up my shopvac and nothing was passing through them!!
After much research I came to the conclusion that a properly maintained system with proper regular treatment did not need an exhaust filter - so off they came.
Pumpouts became much easier and faster. Obviously you will still run across systems with poor suction, but overall this made a huge improvement in our pumpouts. And no smell!!
2002 Carver 396
Twin Cummins 6BTA 370HP
- bud37
- Admiral
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Re: Blackwater pumpout question
- Midnightsun
- CYO Supporter
- Posts: 2851
- Joined: March 27th, 2016, 2:27 pm
- Vessel Info: The Midnight Sun
2007 41CMY
Volvo D6-370's - Location: Montreal, Canada
- Has thanked: 257 times
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Re: Blackwater pumpout question
bud37 wrote:Source of the post I like the newer systems with the much larger I think 1.5" vent lines, tanks breathe better like that.
We have this on our Carver. Vent lines are the same size as the rest of the lines at 1 1/2" ID. They also installed tank savers which makes the system pretty much safe no matter what you do. All of this is factory, no mods done by me.
- KyleR
- CYO Supporter
- Posts: 217
- Joined: July 8th, 2022, 10:50 am
- Vessel Info: MV Verity
2002 Carver 396
Twin Cummins 6BTA 370HP - Location: On the move!
- Has thanked: 83 times
- Been thanked: 63 times
Re: Blackwater pumpout question
We have this on our Carver. Vent lines are the same size as the rest of the lines at 1 1/2" ID. They also installed tank savers which makes the system pretty much safe no matter what you do. All of this is factory, no mods done by me.
Same on our 2002 396....
2002 Carver 396
Twin Cummins 6BTA 370HP
- bud37
- Admiral
- Posts: 4683
- Joined: April 23rd, 2015, 10:22 pm
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Re: Blackwater pumpout question
More of a comment for folk that have older systems or have retrofits with small vent line sizes who may be encountering issues. I believe Kyler's post helped bring that to light.
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