# Question: What Size Black Pipe Is Needed To Supply 2 Gas Storage Water Heaters?

## What size gas line do I need for a water heater?

Rinnai Tankless Water Heaters typically require a 3/4″ gas line to provide a sufficient gas supply to the unit’s burner. However, if there is sufficient pressure and the gas line is short enough, there are some cases where a 1/2″ gas line can be used, which is the most common size used in the United States and Canada.

## What size gas line do I need?

Section 1, supplying outlets A and B, or 35 cubic feet per hour requires ½ inch pipe. Section 2, supplying outlets A, B, and C, or 94 cubic feet per hour requires 3/4 inch pipe. Section 3, supplying outlets A, B, C, and D, or 230 cubic feet per hour, requires 1 inch pipe.

## How many BTU can a 3/4 gas line carry?

Total piping length = 84 feet (use Table 3 @90 feet) From a to b, demand = 38,000 + 35,000 + 30,000 = 103,000 BTU/hr; use 3/4″ pipe From b to c, demand = 38,000 + 35,000 = 73,000 BTU/hr; use 1/2″ pipe or 3/4″ tubing From c to d, demand = 35,000 BTU/hr; use 1/2″ pipe or 5/8″ tubing From c to e, demand = 38,000 BTU/hr;

You might be interested:  FAQ: How Does The Underground Sprinkle Systems Look Where It Comes From Water Supply Out Of House?

## What is the best pipe to supply gas?

CSST tubing, or corrugated stainless steel tubing, is good for installing gas appliances. These corrugated pipes can bend around corners reducing the number of joints and fittings. Easier to work with than steel pipe and weighs a lot less.

## How far can you run 1/2 inch gas line?

This chart allows a 200,000 BTU gas appliance to be installed on a ½-inch gas line up to 40 ft. in length. However, the following conditions must be met: The minimum static gas pressure must be 8 in.

## Can a gas line be too big?

GAS PIPE SIZING You can flow only so much gas (or water) through a given pipe size, so restrictions will manifest themselves as a lack of pressure or volume. Sizing a gas line is not too difficult.

## What size gas pipe should supply a range cooker?

You need 28mm from the meter to the tee, 22mm for the boiler and 15mm for the range.

## What happens if gas line is too small?

IF the gas line were too small, the burner AND pilot would go out, and then you would not have enough hot water until your relighted it. 2. An indirect heater does NOT get “free heat” and if the boiler is not adequate for the heating AND hot water demands the performance will be less than desired. 3.

## How many BTUs can a 3/4 copper pipe carry?

3/4″ Pipe = 3.5 GPM = 35,000 BTU/hr. 1″ Pipe = 7.5 GPM = 75,000 BTU/hr. 1-1/4″ Pipe = 12 GPM = 120,000 BTU/hr.

## Can I run my own gas line?

Yes in most jurisdictions you can. It’s a very good DIY project and it can be done very safely. First you need to obtain the proper permit. Never attempt to do work on, or install gas piping without first checking with local code authorities and obtaining the proper permits.

You might be interested:  FAQ: When You Have A Limited Water Supply Is It Better To Drink Little By Little Or All At Once?

## How far can you run flexible gas line?

The flexible connector length usually is limited to 3 feet except for gas ranges and clothes dryers. For these appliances, 6 feet generally is allowed. Splicing or joining connectors with nipples often is prohibited.

## Can you over tighten gas pipe?

Hand Tight is Right. Over-tightening will also warp the rubber fittings inside the pipes over time, which can increase the risk of leaks. Turn a plumbing fitting only until you feel it tighten, then stop. Teflon tape seals the gas fittings’ threads and keeps leaks from developing.

## Can I use PEX for gas line?

Yes you can, but because the terms PE and PEX have so often been used interchangeably it’s important to specify your intended use before purchasing polyethylene pipe for your project.