Reducing Coupling vs Reducing Bushing - Which One?

[GlockFu]

I am going to get the Fluval SP6 which will feed 4 tanks. The SP6 calls for 1.25" pipe but I want it to go to 1" since the tanks are already drilled for 1" bulkheads. I am going to go from the pump, up to a 1.25" tee and then split into two different sides of the rack that will be 1" pipes that lead to the tanks.

Would I use reducing bushings or reducing couplings when going from the 1.25" tee to the 1" pipes? Which is better and why?

These are examples of what I'm referring to:

Reducing Coupling

Reducing Bushing

 

[tdtreefer]

Use two bushings on the T both are going to restrict flow the same. Bushings would just be easier to work with

 

[Ted_C]

I'd save some money and use a 1 1/4" reducing tee

http://www.pvcfittingsonline.com/401-132-1-x-1-x-1-1-4-schedule-40-pvc-reducing-tee.html

 

[GlockFu]

Thanks for the replies

I'd save some money and use a 1 1/4" reducing tee

http://www.pvcfittingsonline.com/401-132-1-x-1-x-1-1-4-schedule-40-pvc-reducing-tee.html

Awesome... I didn't know if I could find one. Shipping on it kills it from that site though but I'm already going to be placing an order on Zoro.com so would this one be the equivalent but in a schedule 80 (TEE FITTING)? The different order of the dimensions is throwing me off, I don't know which measurement is for which hole.

 

[CuzzA]

I don't like tees anywhere in my plumbing. May as well be a brick wall. Instead use a manifold. I'd use a 1.25" x 1.5" threaded adapter to a 1.5" threaded union then a 1.5" by 4x 1" distributor to feed the four tanks.

http://flexpvc.com/cart/agora.cgi?p=PVC-Distributors&p_id=672-4620&xm=on&ppinc=detail

There's also no reason to use SCH 80 PVC on our systems. It only reduces flow and there are no situations where we would come close to needing the pressure rating that comes with SCH 80. Use SCH 40 PVC.

 

[Ted_C]

The different order of the dimensions is throwing me off, I don't know which measurement is for which hole.

Nope - that's going to probably be a 1" to 2 x 1 1/4" expanding tee. The last number in the fitting's Tee dimensions is the "nub" - the first two numbers are the "straight through" portion of the tee.

I myself only deal with us plastics online and with pvcfittings online. I usually start putting my job together - then find all of the parts I need.