Not that hard, just remember to turn off the water to the house.
---------- FOLLOW-UP ----------
QUESTION: Where is the cartridge on the tub faucet? Do I need the old one out to order a new one or are they standard?
Answer The cartridge is behind the handle, inside the wall valve. Did you look at the link I sent. it's all there. it shows both a sink faucet and a tub/Shower valve replacement.
It wouldn't hurt to have the old cartridge when you go to get the new one so you can match it up exactly.
Pretty much any residential plumbing questions. For "item specific" details such as a specific model of fixture, I will need to research and there may not be any useful information available.
Note: I live and work in Southern California. We do not, as a rule, use hot water or steam heating systems, oil fired boilers or private water wells so my knowledge in those areas is pretty limited. There are others here on AllExerts that can probably answer those questions better.
Retired, Licensed General Contractor with Plumbing license. Active Home Inspector, Litigation Consultant and Infrared Thermographer, Online Marketing specialist.
Publications ActiveRain.com "Rain Maker" as "Inspector Dana", www.TheGoodMoneyLife.blogspot.com about making money online.
Education/Credentials 30+ years in the building trades, Licensed General Contractor (Retired), Certified Infrared Thermographer
Internet Entrepreneur, Amazon & eBay Merchant (deals-by-dana)
Awards and Honors Listed FHA Fee Inspector, FHA 203(k)Consultant, HUD Mobile Home Inspector
Past/Present Clients Home buyers, sellers and owners, Investors, Commercial roofing companies (infrared roof scans for moisture intrusion, Litigation Consulting for "Slumlord" laws in SoCal