head problems

sabotmaker · Post by **sabotmaker** » Fri Jun 03, 2011 12:09 pm

I have a 1984 10 meter, fly bridge, aft cabin Trojan. Vacuum flush system. The head adjacent to the galley works great. Head in the aft cabin builds very little if any vacuum. Replaced gasket in head bowl but no change. BTW...the vacuum pump will not shut down automatically. Have to start and stop it with toggle switch. Must have a vacuum leak some where but how does one run down a vacuum leak with any degree of ease ??

Audrey II · Post by **Audrey II** » Fri Jun 03, 2011 4:11 pm

Time to replace the duck bills you can pick them up anywhere but here is a link.

http://www.sealandservices.com/vacuflush_parts.htm

sabotmaker · Post by **sabotmaker** » Fri Jun 03, 2011 8:43 pm

I picked up a pair of duckbills a few days ago. Since the front head works good I was inclined to think duckbills may not be the problem. There are two duckbills and both are on the same side of the pump and both are oriented in the same direction. Hopefuly they are the problem...will replace them in the morning .

sabotmaker · Post by **sabotmaker** » Fri Jun 03, 2011 8:56 pm

I picked up a pair of duckbills a few days ago. Since the front head works good I was inclined to think duckbills may not be the problem. There are two duckbills and both are on the same side of the pump and both are oriented in the same direction. Hopefuly they are the problem...will replace them in the morning .

kevinz · Post by **kevinz** » Sat Jun 04, 2011 9:01 am

If the duck bills dont fix it, check the pressure switch on the vacuum tank and all hose clamps. Could be a air leak.

rbcool · Post by **rbcool** » Sat Jun 04, 2011 10:18 am

Had the identical prob with my forward head. I have 2 pressure tanks and a seperate set of duckbills for each system. The forward duckbill was shot, so Ireplaced both sets while down into it. Works like a champ now

Ron

sabotmaker · Post by **sabotmaker** » Sat Jun 04, 2011 11:04 am

I have two vacuum tanks also. Located just one pair of duckbills on one side of the pump. Would there be another pair of duckbills hiding from me ??

rbcool · Post by **rbcool** » Sat Jun 04, 2011 11:53 am

Mine has in-line duckbills on the hoses coming from each tank. Follow each hose that comes from the toilet to the pressure tank, there should be a coupling that comes apart, duckbill inside.

Ron

Big D · Post by **Big D** » Sat Jun 04, 2011 10:53 pm

Maybe the older units are different but aren't there 2 dbills on each side of the pump for a total of 4?

koviak · Post by **koviak** » Sun Jun 05, 2011 7:46 am

Just replaced mine a few weeks ago and yes there are (2) duckbills on each side of pump.

rbcool · Post by **rbcool** » Sun Jun 05, 2011 9:13 am

Mine also has duckbills on the pump, but also inline. Fortunately the ones at the pump were ok

Ron

sabotmaker · Post by **sabotmaker** » Mon Jun 06, 2011 5:39 pm

I do have duckbills on each side of the pump plus 2 more in the double head system. Parts are ordered! Thank you to all the forums members diagnosing my problems !!

Wes · Post by **Wes** » Mon Jun 06, 2011 8:43 pm

When we got ours there was one vacuum pump and 2 duck bill valves on the pump. There was also a T connector with duck bill valves where the lines were joined to go into the tank. I replaced all the valves and also installed a second vacuum pump in the aft head so that if one head goes down I still have a working head.