Primary/Secondary Question

EJW

I am doing my first primary/secondary system and had a question. After reading the section on primary/secondary in Dan's book i'm still not clear on one thing. The secondary manifolds are horizontal and have been piped so all the branches come off the bottoms of each to keep air from going up into a zone not calling. Should I connect the ends of the manifolds after the last zone making a loop? If I don't won't all of the air collected in the feed side end up in my last zone off the manifold?

Dan Peel

circles in circles

In order to have a primary "loop" it must loop. Otherwise you just have a supply manifold and a return manifold if i understand your description. Typical setup will have closely spaced Ts on the primary and a circulator to deliver flow to your emitters. Use air elimination on your primary and let it flow. Dan

To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Professional"

Unknown

Follow Dan's \"Pumping Away\"

Secondary injection loop comes off the bottom? PERFECT!!!

Just pipe it that way & "let it flow". No need to worry about first or last circuits off the secondary loop. It's forced circulation. Right? Makes no difference if you have verticle drops it just helps the overall situation.Air elimination device placed in the right location (PONPC) will take ALL the oxygen out shortly after the first cold purge. Walk away with confidence.

Welcome to the Pumping Away club:)

Gary

To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Professional"

EJW

I understand that gary and I have a spiro vent right before my primary pump. I need to know if the secondarys should be capped at there ends or tided together to make a loop. Thanks, EJW

EJW

Bump

EJW

Bump 2

Unknown

Cap em off at the ends.

It may look, to the (untrained eye), that they (the loop ends) will hold air but, you must start thinking on a molecular level. It's not happening. EVER!!!

Secondary loops flow from the supply to their returns through 2 close spaced Tees or a Low Loss Header Correct?. No need to tie S&R secondary ends together. That defeats the whole "circle" >loop< and bypasses the secondary loops = no flow. Right? I may still be confused but it never makes sense to just tie the ends of the secondary loops together. Am I missing something?

Bump all you want but you must be more specific in order to receive the wealth and knowledge of the Wallies. zPost a simple drawing. That would help. You came to the right place.

Good Luck

Gary
To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Professional"

EJW

Thanks Gary, I bumped to keep the question alive and near the top where people would see it. If you had said in your first post what you did in your second I wouldn't have had to.