dawoodwa
Silver Member
The 8 roller pump will give you a more constant steady pressure than the 4 roller. You won't have the pressure spikes which will give you a more even flow rate. I only use the 8 roller pumps but I usually pick them up out of someones scrap pile and rebuild them. I always flush with water after using and like to flow some vegetable oil thru them ot keep them lubricated if they will be sitting for very long. When you take a pump apart you can see the rollers in the lobes and the close tolerances, doesn't take much rust to cause them to stick.
For your application you could probably pick a rebuild kit up and rework your pump and it should take care of your needs.
For your application you could probably pick a rebuild kit up and rework your pump and it should take care of your needs.