Outdoor Shower

[wecker1]

We've settled into our Summer retreat at the family farm in the mountains of Upstate NY and I've decided to built a stand-alone outdoor shower along with a utility sink for washing pots, pans, etc. as the RV kitchen sink is way too small. I was planning on using the outdoor shower water supply connection as my water source for both but don't want to have to control the water temperature with the hot/cold control handles in the convenience center. I want to be able to control the water temperature individually at both the shower and sink, respectively. I'm thinking of utilizing the hot/cold low point drain water lines in the convenience center and piping them to the hot/cold connection on the shower/sink. I'll leave the low point valves open and control flow and temperature at the shower/sink. Curious if anyone has done this and/or your thoughts on if it will work? Any concerns with leaving the low point drain valves open? Much thanks.