Need help identifying valve

I recently had my water heater replaced with a tankless unit. It's an old house and during the install one of the valves started leaking, the contractor used a temp fix to connect it to the non leaking valve with a hose.

I want to replace both valves but not sure what type of valve it is. It looks like a hose bib or some kind of gate valve.

Questions:
These water lines are going into the water heater so the valves should be lead free correct?
A utility sink and washer/dryer will most likely be tapped into the same water lines in the future, how can I future proof this?
What type of valves should I buy to replace these?

Amazon links to good quality valves would be appreciated.

Yes they should be lead free look up Apollo valve co you should find what your looking for

That's a contractor install if I've ever seen one

It must be me but I just can't grasp what happened by your description, "It's an old house and during the install one of the valves started leaking, the contractor used a temp fix to connect it to the non leaking valve with a hose.".

Are you referring to those 2 red handled hose bibs that were existing on those 2 drops? They look like they may have been there for a washing machine, at some time.

It seems a bit strange that the water heater is being fed cold water and feeds the hot water system by way of those 2 drops. Was that the way your old water heater was connected?

It would appear that it was not a plumber that did this installation for you.

Those two old valves should be a relatively simple replacement. But that should be the least of your concerns.

Where does that clear tube coming from the vent lead to?

Please take a picture of the general location of the vent from the outside of the house, and let us see that.