Wash. Admin. Code § 51-11C-40403 - Section C404.3-Efficient heated water supply piping
Table C404.3.1 Piping Volume and Maximum Piping Lengths
Nominal Pipe Size (inches) |
Volume (liquid ounces per foot length) |
Maximum Piping Length (feet) |
|
Public lavatory faucets |
Other fixtures and appliances |
||
1/4 |
0.33 |
6 |
50 |
5/16 |
0.5 |
4 |
50 |
3/8 |
0.75 |
3 |
50 |
1/2 |
1.5 |
8 |
43 |
5/8 |
2 |
8 |
32 |
3/4 |
3 |
0.5 |
21 |
7/8 |
4 |
0.5 |
16 |
1 |
5 |
0.5 |
13 |
1 1/4 |
8 |
0.5 |
8 |
1 1/2 |
11 |
0.5 |
6 |
2 or larger |
18 |
0.5 |
4 |
The volume from the nearest source of heated water to the termination of the fixture supply pipe shall be as follows:
Table C404.3.2.1 Internal Volume of Various Water Distribution Tubing
Ounces of Water per Foot of Tube |
|||||||||
Nominal Size (inches) |
Copper Type M |
Copper Type L |
Copper Type K |
CPVC CTS SDR 11 S11 |
CPVC 40 |
CPVC 80 |
PE-RT SDR |
Composite ASTM F1281 |
PEX CTS SDR 9 |
3/8 |
1.06 |
0.97 |
0.84 |
N/A |
1.17 |
- |
0.64 |
0.63 |
0.64 |
1/2 |
1.69 |
1.55 |
1.45 |
1.25 |
1.89 |
1.46 |
1.18 |
1.31 |
1.18 |
3/4 |
3.43 |
3.22 |
2.90 |
2.67 |
3.38 |
2.74 |
2.35 |
3.39 |
2.35 |
1 |
5.81 |
5.49 |
5.17 |
4.43 |
5.53 |
4.57 |
3.91 |
5.56 |
3.91 |
11/4 |
8.70 |
8.36 |
8.09 |
6.61 |
9.66 |
8.24 |
5.81 |
8.49 |
5.81 |
11/2 |
12.18 |
11.83 |
11.45 |
9.22 |
13.20 |
11.38 |
8.09 |
13.88 |
8.09 |
2 |
21.08 |
20.58 |
20.04 |
15.79 |
21.88 |
19.11 |
13.86 |
21.48 |
13.86 |
Notes
Statutory Authority: RCW 19.27A.020, 19.27A.025 and chapters 19.27 and 34.05 RCW. 13-04-056, § 51-11C-40403, filed 2/1/13, effective 7/1/13.
State regulations are updated quarterly; we currently have two versions available. Below is a comparison between our most recent version and the prior quarterly release. More comparison features will be added as we have more versions to compare.
Table C404.3.1 Piping Volume and Maximum Piping Lengths
Nominal Pipe Size (inches) | Volume (liquid ounces per foot length) | Maximum Piping Length (feet) | |
Public lavatory faucets | Other fixtures and appliances | ||
1/4 | 0.33 | 6 | 50 |
5/16 | 0.5 | 4 | 50 |
3/8 | 0.75 | 3 | 50 |
1/2 | 1.5 | 8 | 43 |
5/8 | 2 | 8 | 32 |
3/4 | 3 | 0.5 | 21 |
7/8 | 4 | 0.5 | 16 |
1 | 5 | 0.5 | 13 |
1 1/4 | 8 | 0.5 | 8 |
1 1/2 | 11 | 0.5 | 6 |
2 or larger | 18 | 0.5 | 4 |
The volume from the nearest source of heated water to the termination of the fixture supply pipe shall be as follows:
Table C404.3.2.1 Internal Volume of Various Water Distribution Tubing
Ounces of Water per Foot of Tube | |||||||||
Nominal Size (inches) | Copper Type M | Copper Type L | Copper Type K | CPVC CTS SDR 11 S11 | CPVC 40 | CPVC 80 | PE-RT SDR | Composite ASTM F1281 | PEX CTS SDR 9 |
3/8 | 1.06 | 0.97 | 0.84 | N/A | 1.17 | - | 0.64 | 0.63 | 0.64 |
1/2 | 1.69 | 1.55 | 1.45 | 1.25 | 1.89 | 1.46 | 1.18 | 1.31 | 1.18 |
3/4 | 3.43 | 3.22 | 2.90 | 2.67 | 3.38 | 2.74 | 2.35 | 3.39 | 2.35 |
1 | 5.81 | 5.49 | 5.17 | 4.43 | 5.53 | 4.57 | 3.91 | 5.56 | 3.91 |
11/4 | 8.70 | 8.36 | 8.09 | 6.61 | 9.66 | 8.24 | 5.81 | 8.49 | 5.81 |
11/2 | 12.18 | 11.83 | 11.45 | 9.22 | 13.20 | 11.38 | 8.09 | 13.88 | 8.09 |
2 | 21.08 | 20.58 | 20.04 | 15.79 | 21.88 | 19.11 | 13.86 | 21.48 | 13.86 |
Notes
Statutory Authority: RCW 19.27A.020, 19.27A.025 and chapters 19.27 and 34.05 RCW. 13-04-056, § 51-11C-40403, filed 2/1/13, effective 7/1/13.