I believe in that thread he discussed the use of check valves to separate the pressure sensors for each pump. Without the check valves, If one pump failed, the other pump would just pressurize that part of the line, and both sensors would still read the same.
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'15 Juke Nismo
'06 MX-5 GT SOLD
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'90 Black TII vert w/ Sprint RE stock port/turbo DD dyno (242.6whp@5500rpm @12psi 8psi@redline) and (250ftlbtq@4800rpm @13psi) SOLD
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