DIY Pump Out Pump

[forfun1960]

My R-23 does not have a macerator pump and Ranger tells me it will be pretty hard to install one. So I decided to build one that I could connect to the quick coupler on the outlet of the black water tank. The reason to do this is we do a lot of BoaterHoming when towing and without such a pump we could not use the toilet when we are heading home. With this unit, we can pump out when I get home as I have a sewer connection at home I use to discharge my RV tanks.

Also, we can pump out at RV parks or truck stops that have facilities for black water.

Thought others might find of interest. As you can see pretty simple to build from PVC fittings and a couple of valves. Pump and switch ordered from Amazon. Connecting to my 12-volt batteries in the cockpit. The cost to build was around $130.00.

Works really well, the top hose is freshwater to flush the tank, bottom hose discharges with a short piece of clear hose to see when the tank is clean.

Also could use as a high volume bilge pump if needed too. I have a cap for the quick coupler and a couple of short hoses, one connected to the top hose as suction and one on the bottom hose for the discharge.

Pictures are in my album at: gallery2.php?g2_itemId=76973

 

[BB marine]

I like your Idea. I do not have a macerator installed in my C26. The boat was originally purchased to use in Great Lake region so I elected to not have a factory install. I don't feel I would use a macerator often enough to warrant the installation but I have realized a few times that having it in an emergency or for a land pump out would be an advantage.

I am making a similar set up. I have all the parts ordered. I did not use a macerator pump. I was not sure it would have enough suction lift. Most macerators have a maximum suction lift 4' dry, 5' wet impeller. The bottom of my Black tank is less than a 1' off the bottom of the boat. From this location bottom of the tank to the top of the deck is close to maximum suction lift.

I ordered a https://www.amazon.com/gp/product/B0014 ... UTF8&psc=1
1-1/2" hose and 6 ft of lift: 9.5 GPM @ 45 strokes/min; 14 GPM @ 70 strokes/min • Maximum self-priming height - 13-1/2 ft

This pump is designed for deck pump out. It is the small version of what pump out stations use except they have a motor to do the pumping. This one requires manual labor.

I will post a few photo's when I complete my portable pump out.

I'm interested in how well your pump out works. Great idea! I like the fresh water flush. I may incorporate in mine but put it on the suction side of the pump so I can flush the tank , tank hose, pump and pump discharge hose. Thanks for posting.

 

[forfun1960]

The pump works great no problem with suction lift especially considering that when I flush the tank, water stays in the PVC piping/pump suction and primes the pump. Or if the tank is full just crack the valve to add a small amount of water to create a wetted suction for the pump.

One surprising result with the added freshwater flush valve, it is a super-fast step up, just open the valve and you can hear the water rush into the black water tank giving it a great rinse. Close the freshwater valve, flip on the switch, and pump out. I can flush and pump out 3 times faster than I could at any marina, as I do not have to remove anything to add water, just flip the handle and turn it on and done.