Code of Maryland Regulations
Title 05 - DEPARTMENT OF HOUSING AND COMMUNITY DEVELOPMENT
Subtitle 04 - SPECIAL LOAN PROGRAMS
Chapter 05.04.02 - Housing Rehabilitation Program-Applicable Codes and Standards
Section 05.04.02.10 - Mechanical Equipment
Current through Register Vol. 51, No. 6, March 22, 2024
A. Objective. The objective is to provide mechanical equipment for the building and its living units that will meet the needs of the intended occupants and be of quality and condition which will assure safety of operation, adequate capacity for its intended use, protection from moisture, corrosion, or other destructive elements, reasonable quietness of operation, and reasonable durability and economy of maintenance.
B. General.
C. Mechanical Ventilation and Air Conditioning. If mechanical ventilation is required in rooms or other spaces, the equipment or system shall operate satisfactorily if presently in place. If new, it shall be designed and installed to good engineering practice.
D. Heating.
E. Plumbing.
F. Domestic Water Heating and Storage.
G. Electrical.
Table .10-1
Recommended Size Pipe for Replacements and New Plumbing Work
Minimum Size of Individual Pipe Fixtures | ||||||
Branch | Fixture Supply |
Soil or Waste Connection |
Vent Connection | |||
Fixture | H.W. | C.W. | H.W. | C.W. | ||
Water Closet | - | 1/2" | - | 3/8" I.P.S. | 3" x 4" | 2" |
Lavatory | 1/2" | 1/2" | 3/8" O.D. | 3/8" O.D. | 1-1/4" | 1-1/4" |
Bathtub | 1/2" | 1/2" | 1/2" I.P.S. | 1/2" I.P.S. | 1-1/2" | 1-1/4" |
Sink | 1/2" | 1/2" | 1/2" O.D. | 1/2" O.D. | 1-1/2" | 1-1/4" |
Laundry Tray | 1/2" | 1/2" | 1/2" O.D. | 1/2" O.D. | 1-1/2" | 1-1/4" |
Sink and Tray Combination | 1/2" | 1/2" | 1/2" O.D. | 1/2" O.D. | 1-1/2" | 1-1/4" |
Shower | 1/2" | 1/2" | 1/2" I.P.S. | 1/2" I.P.S. | 2" | 1-1/4" |
Table .10-2
Heating Capacity-GPH 100 degrees F Rise
Storage Capacity per Living Unit | ||||||
Living Units | 0 Gal. | 5 Gal. | 10 Gal. | 15 Gal. | 20 Gal. | 25 Gal. |
3 | - | - | - | 85 | 79 | 74 |
4 | - | - | - | 89 | 82 | 75 |
5 | - | - | - | 94 | 85 | 77 |
6 | - | - | - | 109 | 98 | 88 |
7 | - | - | - | 124 | 111 | 99 |
8 | - | - | 152 | 138 | 124 | 110 |
9 | - | - | 159 | 143 | 127 | 112 |
10 | - | - | 165 | 148 | 130 | 113 |
15 | - | - | 248 | 222 | 195 | 169 |
20 | - | 365 | 330 | 295 | 260 | - |
25 | - | 457 | 413 | 369 | - | - |
30 | 600 | 548 | 495 | 443 | - | - |
35 | 660 | 599 | 538 | 476 | - | - |
40 | 720 | 650 | 580 | 510 | - | - |
50 | 810 | 723 | 635 | 548 | - | - |
60 | 900 | 795 | 690 | 585 | - | - |
80 | 1050 | 910 | 770 | 630 | - | - |
100 | 1150 | 975 | 800 | 625 | ||
120 | 1250 | 1040 | 830 | - | - | - |
140 | 1350 | 1105 | 860 | - | - | - |
160 | 1440 | 1160 | 880 | - | - | - |
180 | 1525 | 1210 | 895 | - | - | - |
200 | 1600 | 1250 | 905 | - | - | - |
225 | 1700 | 1308 | 915 | - | - | - |
250 | 1800 | 1363 | - | - | - | - |
275 | 1900 | 1420 | - | - | - | - |
300 | 2000 | 1475 | - | - | - | - |
Note: Table .10-2 gives the recommended minimum recovery rate in gallons per hour at 100 degrees F rise according to the storage capacity (or size) of the tank, and for a designated number of living units. The blank spaces in the table mean the tank size would be either too small to provide sufficient hot water, or too large a tank to be practical.