I have a "Symms" valve on my tub. The problem is that not enough cold water comes through. IF I adjust the valve for a cooler shower I end up with very low flow. I have 115 F water temp as hot water supply. Before I changed the valve I had good cold water flow now it seems I can only get hot water unless I want very low flow.
Is there an adjustment to get more cold water to mix in the valve?

I'm not getting enough cold water flow through this valve. The hot water temp is 115 f. In order to get a cooler shower I have to adjust valve so that only a little water comes out.
HOW DO I INCREASE THE COLD WATER FLOW. I had good flow before changing the valve.

Hey Rich,
Would this be a Symmons Temptrol, (see image)? If not I need the model number. Regards, Tom

Did tou adjust the safety adjustment inside the plastic handle. Or did that piece fall into thebathtub and you forgot how it went together?