Does Union Tee Put Same PSI In Both Firestone Air Bags

Updated 01/05/2026 | Published 09/18/2024

Products Featured in This Question

Firestone Coil-Rite Air Helper Springs - Rear Axle

(736)

$158.89

Firestone Union Tee for 1/4" Tubing

(271)

$26.57

Question:

If I install the Coil Rite 4175 and use union T/splitter does the pressure reading account for a combined pressure from both? Meaning if it reads 35psi is there actually 35 pounds of pressure in each bag or is it just 17.5 pounds of pressure in each bag totaling 35psi? Yes, I'm totally over thinking this :)

asked by: Dan

Expert Reply:

Hey Dan, if you were to use a union tee like the part # F3025-1 with the Firestone Coil Rite kit part # F4175 the entire system would all have the same psi. So if you put 35 psi in to the inflation valve both bags would have that.

expert reply by: Jameson C

Jameson C.

1/5/2026

Hey Dan, how did things go with the Coil-Rite air springs and the union tee setup? Did the shared pressure between both bags give you the ride support you were hoping for? Your experience could help others setting up a similar system.