Plumbing – Does one way check valve reduce the water pressure

plumbing

I am getting very low pressure due to my tank height in home. Input of tank got high pressure but not whole time. Something like below.

Normal situation - figure one

What my idea is directly connect input to low pressure end as below diagram. I have a doubt one way valve is reduced the pressure of high pressure end and low pressure end.

Modification - figure two

If I use like this, will I get high pressure when its available? (I do not have good idea how check valves are working)

Thanks

Best Answer

Yes: your proposed cross-connect will maximize pressure on the outflow. But, as aaron commented, you will need to put a second check valve on the low pressure line between the cross connect and the tank to avoid losing pressure back to the tank (or, worse, blowing it out since there is presumably no shutoff valve on the tank outlet).