Delta Rough in shower and Tub valve, can this port be drilled to add more flow for the tub?

[CaliSkier]

I have been looking at several valves trying to find one that will fill my tub fast, and then I saw this...

It has a port at the top (red arrow) that feeds the tub spout and shower, its a hole that narrows down to a small size (at least on mine it does). The bottom hole, blue arrow is blocked. I was wondering if I could just dril a hole throught that to allow for more water to enter the tub spout. Is this going to cause a problem? If the tub spout is stopped it will send the water to the shower right so no problem, right?

Delta Faucet R10000-UNBX

 

[CaliSkier]

thoughts?

 

[Sponsor]

 

[John Gayewski]

thoughts?

I'll go ahead and speak for almost everyone who does this kind of work. No don't drill your valve. There's no upside, and it's almost a silly proposition as the cartridge is the limiting factor and not the valve.

 

[Reach4]

Have you looked into the R10000-UNBXHF ?

I think HF stands for High Flow.

EDIT... forget that. That is shower only, and the tub port is blocked.

https://www.deltafaucet.com/bathroom/product/R10000-UNBXHF.html

 

[CENTRALFL]

From prior posts, these are some of the valves that are referenced, if you want high flow rate...

Kohler K-2976-KS-NA MasterShower 3/4 - 17 gpm might be hard to beat...

https://www.lowes.com/pd/KOHLER-MasterShower-3-4-in-ID-x-1-2-in-OD-PVC-Brass-Thermostatic-Mixing-Valve/1000040855

R10000-UNBXHF with 17t cartridge

From this thread:

Single handle shower/tub valve recommendations for good flow rate?

Getting ready to renovate the bathroom and want to find a good quality single-handle mixing/diverter valve that will give us good flow rates at the tub AND shower spouts (before shower head). I was very unhappy with the flow rates from the Moen I put in my last bathroom a couple of years ago...

terrylove.com

 

[CaliSkier]

Thanks all of you guys. I really really appreciate it.