Celebrating 20 Years of Service! Serving Middleton, Madison and Waunakee



If you are looking for a professional, licensed plumbing company to replace your water heater, Dallman Plumbing is an excellent choice.  If your existing heater is between 10-15 years old, and you are having problems, replacing the unit for a new, more efficient and better insulated model may be more cost effective than scheduling a repair.

Replacement process

When your water heater replacement is scheduled, we will show up (and unfortunately, shut off your water!), disconnect and drain down your heater while your new heater is being delivered. Your floors will be protected and your walls and doors will be watched closely to ensure no damage occurs while your new heater is carted in and when your old heater is carted out. We do not rely on short cuts to get to the next job as soon as possible. We do not install heaters with flexible supplies. Depending on the situation, replacements typically take between 3-5 hours.  

When you call for replacement prices, what do you need to know? How to identify your heater.

What type of water heater do you have? 

Here are the three most common types of heater:

Power vent (gas) -  These units have a motor with a fan on top that plugs into an electrical outlet. The vent will run horizontally out the side or back of the house with white PVC piping.

Chimney vent (gas) - These units are vented with metal ducting that that connect to your home's chimney.

Electric - Electric heaters have no vent at the top of the tank and have no gas supply; they are powered by electricity and have a dedicated breaker (to turn the heater on/off) at the electrical panel.


How big is your water heater?

The size of your heater is determined by the number of gallons of water it holds. If you don't know the capacity of your water heater, look for a silver sticker on the front of the tank that contains the tank's model and serial numbers.  Here you will also find the capacity of the tank listed.

Tankless heaters

There are situations where tankless heaters are a great choice for homeowners. If you are interested, please call for more information.

Why Ruud and not a home store water heater?

There is a difference in the quality of a Ruud water heater vs. what is sold at the home stores.

Tank strength. With the heating and cooling process, tank welds are stressed. Additionally, in this area, our water is hard on metal and wears it away. Ruud water heater tanks are built to be sold by contractors and have stronger welds than cheaper models. 

Sacrificial anode thickness. One feature that water heaters use to combat hard water is the sacrificial anode. This is a tube that is inserted into the top of the tank so aggressive water can attack it as opposed to the tank. Ruud  anode rods are made thicker for this purpose.

Brass drains vs. plastic drains. When doing service or maintenance to a water heater, draining the heater down is often required. Plastic hose threads and plastic valves on tank drains can and do fail. Ruud water heaters use brass drains.

Warranty and warranty extensions.


Most Ruud residential water heaters come with a standard 6 year tank and parts warranty.  During this time, if your new water heater fails, the heater itself or any failed part will be provided at no charge by the manufacturer. 

Warranty extensions: 

1. Purchase a 6 year tank and parts warranty water heater and add a 4 year warranty extension (good for 10 years).

2. Purchase an 8 year tank and parts warranty water heater and add a 4 year warranty extension (good for 12 years).


What maintenance can be done to extend the life of the tank of your water heater? 

1. Every 1-2 years: To help prevent scale and sediment build up, it is important to shut the heater down and drain the heater down.

2. Every 3-5 Years: It is a good idea to replace your sacrificial anode rod once every 3-5 years.

If you would like help maintaining your water heater, call us!