Shower Faucet Leaking at the Base

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New Member
Mar 22, 2019
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San Francisco
I recently replaced my slip-on tub faucet because the old one was leaking from the spout and the base where the opening is for the hex screws. Now the new one is also leaking from the base where the hex screws is when the water is on. I say leak, but it's actually pouring out of the opening at the base.

The pipe is fine, no leaks there and it's only when the tub is on. I've used plumbers putty and all of the o-rings are in tact (which I thought was the problem with the faucet I took off). The water trickles out when the tub is running but pours out when the shower is engaged so it looks like the diverter might not be working properly but to have the same problem on 2 separate faucets is odd.

I'm losing my mind trying to figure it out, any help is appreciated.