Raw water issues with 27OB

[Capt.Bill3]

We have a 2022 R27 OB. This weekend we noticed no water getting into the toilet and hardly any getting into the raw water wash down. I checked the strainer and it was clear. I pulled the hose at the T between the wash down pump and the toilet in the center lazerette and noticed chunks of pink plastic at the connection. At first I thought it might be some sort of internal sleeve but then thought it might be the remains of at anti siphon valve. Once I cleared it things were better, although the toilet still doesn't seem to be filling with water as well after we flush. Has anyone else run into this and does anyone know if they put some sort of valve in the line, and if I need to replace it?

I also noticed that if the boat sits for a week, when I used the raw water wash down for the first time, there is a strong sewage smell. Another 27OB owner noticed the same thing with his boat. I do close the seacock when we leave for the week. Has anyone else come a crossed this sort of thing?

 

[AG3]

I can’t speak to the line clogging but I will comment on the odor issue.

We had the same issue. I once thought it was just the lav gassing off whenever we flushed but when I got a face full of stank washing down the dinghy I suspected something more. There was a thread not too long ago about installing an inline chlorination filter in place of the sea strainer. The Commodorizer, meters a small amount of chlorine into the salt water system and pretty much destroys all smell. Flushing the head and using the raw water wash no longer stinks. I kept the original sea strainer and install the Commoderizer just the right of it (toward boats starboard.) I technically have two strainers before the raw water pump now allowing me to run with or with the device.

Thanks for the recommendation of the Commodorizer! I've been looking at it on their website and it seems like a great solution to raw water head smells. I notice that they sell chlorine resistant valve kits which leads me to wonder whether their chlorine tablets contribute to quicker deterioration of the valves in the toilet. Have you noticed this and/or have you had to replace your valves sooner rather than later?

Thanks,

 

[80Ramey]

Thanks for the recommendation of the Commodorizer! I've been looking at it on their website and it seems like a great solution to raw water head smells. I notice that they sell chlorine resistant valve kits which leads me to wonder whether their chlorine tablets contribute to quicker deterioration of the valves in the toilet. Have you noticed this and/or have you had to replace your valves sooner rather than later?

Thanks,

We have about 150 hours the commodorizer now. My 11 month review is, it’s not perfect. It does a good job of keeping the lav smelling better, especially with frequent use. Smell of slight chlorine. However, if the boat sits with raw water in for a couple of weeks, the first flush still has some stank to it. Also, it’s not metering enough to really knock down all odor from the holding tank after it’s sat awhile.
Our standard practice is pump out early and often. And pump out after you have a clean lav smell. We also fresh water flush the tank if it’s available.

I haven’t noticed any degraded performance on the pump itself. The membrane and action appear fine.

 

[AG3]

We have about 150 hours the commodorizer now. My 11 month review is, it’s not perfect. It does a good job of keeping the lav smelling better, especially with frequent use. Smell of slight chlorine. However, if the boat sits with raw water in for a couple of weeks, the first flush still has some stank to it. Also, it’s not metering enough to really knock down all odor from the holding tank after it’s sat awhile.
Our standard practice is pump out early and often. And pump out after you have a clean lav smell. We also fresh water flush the tank if it’s available.

I haven’t noticed any degraded performance on the pump itself. The membrane and action appear fine.

Thanks so much for your very informative reply. I'm grateful.

 

[fidalgoisland]

Like many others we experimented with using just fresh water to flush the toilet to see if it would eliminate the odor. As we suspected it would it did. Not wanting to continue to manually flush by dumping water in the toilet and also not wanting to connect to our main fresh water system (sorry I don't trust check valves, etc), we decided to install a separate 10 gallon tank for the fresh water flush. It is installed in the starboard lazarette (see picture) where it connects to the toilet using the old salt water flush line. I capped the salt water line so it could be switched back if wanted. So far it has worked great for the three of us and easily gets us through a weekend. We can of course add to it from the main fresh water tank if necessary if not near a fresh water source. A side benefit is that it also offsets the weight problem with the kicker lean to port. I'm sure this isn't for many but so far works great for us.

 

[AG3]

Like many others we experimented with using just fresh water to flush the toilet to see if it would eliminate the odor. As we suspected it would it did. Not wanting to continue to manually flush by dumping water in the toilet and also not wanting to connect to our main fresh water system (sorry I don't trust check valves, etc), we decided to install a separate 10 gallon tank for the fresh water flush. It is installed in the starboard lazarette (see picture) where it connects to the toilet using the old salt water flush line. I capped the salt water line so it could be switched back if wanted. So far it has worked great for the three of us and easily gets us through a weekend. We can of course add to it from the main fresh water tank if necessary if not near a fresh water source. A side benefit is that it also offsets the weight problem with the kicker lean to port. I'm sure this isn't for many but so far works great for us.

View attachment 25789

Hi Dennis: What a clever idea. Impressive!

 

[S Scott]

Like many others we experimented with using just fresh water to flush the toilet to see if it would eliminate the odor. As we suspected it would it did. Not wanting to continue to manually flush by dumping water in the toilet and also not wanting to connect to our main fresh water system (sorry I don't trust check valves, etc), we decided to install a separate 10 gallon tank for the fresh water flush. It is installed in the starboard lazarette (see picture) where it connects to the toilet using the old salt water flush line. I capped the salt water line so it could be switched back if wanted. So far it has worked great for the three of us and easily gets us through a weekend. We can of course add to it from the main fresh water tank if necessary if not near a fresh water source. A side benefit is that it also offsets the weight problem with the kicker lean to port. I'm sure this isn't for many but so far works great for us.

View attachment 25789

I like that looks of that. Where did you get the tank?

 

[fidalgoisland]

I like that looks of that. Where did you get the tank?

Most of the parts I found on Amazon. I tried a couple other tanks before I found one that fit the best. It is modified...I added the filler port, vent and the hose connection. Since I didn't plan to ever use the large cap opening on the side I sealed it to prevent leaks. I also have a shutoff valve between the tank and the toilet. I have not connected the salt water rinse yet but am considering so I can use it to do a quick engine flush when needed. I can send you the links if you like.

 

[AG3]

Most of the parts I found on Amazon. I tried a couple other tanks before I found one that fit the best. It is modified...I added the filler port, vent and the hose connection. Since I didn't plan to ever use the large cap opening on the side I sealed it to prevent leaks. I also have a shutoff valve between the tank and the toilet. I have not connected the salt water rinse yet but am considering so I can use it to do a quick engine flush when needed. I can send you the links if you like.

Hi Dennis:
If not too much trouble for you, I would love to receive from you the links to the parts for your fresh water flush set up.

 

[S Scott]

Most of the parts I found on Amazon. I tried a couple other tanks before I found one that fit the best. It is modified...I added the filler port, vent and the hose connection. Since I didn't plan to ever use the large cap opening on the side I sealed it to prevent leaks. I also have a shutoff valve between the tank and the toilet. I have not connected the salt water rinse yet but am considering so I can use it to do a quick engine flush when needed. I can send you the links if you like.

The links would be great. Thanks!