While it may sound good on paper, don’t expect potential buyers to agree to a higher price because you invested in new plumbing or a new HVAC unit for your home.
In general, Buyers are impressed by what they see, not what is hidden behind walls or kept in the basement.
It is not that they do not appreciate having quality, operational equipment & systems, but these are features they expect to be included in the purchase price of any home in the same way a car buyer feels entitled to new tires or a CD player.
The market value of your property will be dictated by location, size, condition, views, & design. If you want a different price, this is what needs to be changed.