Gas Water Heater and Furnace Chimney Flue Size Calculations

Chimney Flue Size Calculations
The following gas water heater and furnace chimney flue size calculations are based on Peoples Gas “Construction Guide for Gas Usage” in the city of Chicago and National Fuel Gas Code. Before applying any of the following rules, you must check your local building code requirements, and appliance manufacturer installation instruction.

Have you checked your house brick chimney lately… or whatever type of the chimney you have?
Did you have a new furnace or water heater installed / was your house chimney flue recalculated for those new appliances?

Make sure that you chimney flue size / diameter is correct; […]

Cast Iron Drain Pipes Problems

If you are living in an older house, its plumbing might contain cast iron drain lines. Compared to the newer PVC pipes, cast iron drains are much quieter during operation; but at the same time they might prove to have significant, and quite expensive, problems. Some of a cast iron pipes have a tendency to … Read more

Plumbing Vent Problems in Your House | Sewer and Drain

House Plumbing Vent, Sewer and Drain
The purpose of a plumbing vent in your house is to remove sewer gases from the drainage system and equalize its atmospheric pressure. Without the plumbing vent, our toilets and all other home plumbing fixtures might not be draining properly, can cause unusual noises (like gurgling or belching as and after they discharge), and could be responsible for an unpleasant sewer gas smell inside the house.
A house plumbing vent is one of those features that may easily become compromised.

Some of the most common reasons for the plumbing vent to lose its performance is our […]

Chimney Flue Requirements, Furnace and Water Heater Venting

House chimney the wrong way

Proper furnace / water heater venting is an extremely important issue, which depends on the performance of the house chimney / chimney flue or other exhaust assemblies. The conditions explained in this post also apply to the wood burning appliances.
Consequences of improperly assembled vent pipes, problematic chimney flue, deteriorating chimney walls can be sometimes fatal – fire and Carbon Monoxide poisoning are topping the list.
Therefore, combustion products from your furnace, water heater, wood burning fireplace, and any other appliance that requires some kind of an exterior vent / chimney, have to be properly properly discharged to the exterior.

Certain requirements […]

Water Heater Gas Connector | Flexible Gas Water Heater Connectors

Water Heater Gas Connector
Illinois remained very conservative, as far as water heater gas connector type (or any other permanently installed appliance gas connection), which used to be black steel pipe only.
However, according to Peoples Gas / Nicor website “Updated Construction Guide” (just fill-up the pup-up from and you’ll be able to open it) the use of CSST – corrugated stainless steel tubing, as a final gas connection for permanently installed appliances, such as water heaters, furnaces and boilers is now permitted.
If you are planning to use CSST tubing as a water heater gas connector, make sure that you consult this […]

Water Heater TPR Valve is Not a Choice – it is a Requirement

Water Heater TPR Valve
Water heater TPR valve must be installed on every water heater (gas or electric).
TPRV – Temporary Pressure Relief  Valve
Water heater TPR valve is also known as Watts Temperature and Pressure Relief Valve. The pressure relief valve is usually located on top or side wall of the tank enclosure (tankless water heater safety valve, also known as T&P valve is located underneath the appliance).
Some old water heater tanks (1960s or earlier – they are still operating in some houses), were not equipped with pressure relief valves, and I would highly recommend replacement for safety and financial reasons […]

Gas Pipes

Threaded black-iron gas pipe distributing fuel through the house was up until recent time, the only type of material permitted (not the only one used) by code in Illinois, with copper, aluminum tubing / piping used as final connections to supply gas burning appliances (max 10′ long, entire section should be visible), and flexible connectors. … Read more