Brochure

See Safety & Relief Valve Catalog (SRCA9000) for more detailed information about the products in this section.
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TPC 18C500 SERIES
HIGH CAPACITY COMMERCIAL T&P VALVES
The Apollo 18C-500 Series bronze automatic temperature and pressure relief
valves are used for protection of high capacity commercial hot water heaters
and storage tanks.
FEATURES
• 3/4” through 2” NPT connections
• ASME Section IV certied capacity
• CSA listed and Certied to ANSI Z21.22
• 125 and 150 psig set pressures at 210°F max
• Coated element protects against corrosion
• SS elements (1-1/2” and 2”)
• Canadian Registration Number CRN-0G1438.6C
• Made in USA
Series
Number
Size (in.)
Element
Length (in.)
Inlet Type
CSA Capacity
Rating
Btu/HR
*ASME Cap.
Rating
BTU/HR
18C5113125 3/4” 2.69” M 185,000 1,619,000
18C5113150 3/4” 2.69” M 185,000 1,912,000
18C5115125 3/4” 4.38” M 205,000 1,619,000
18C5115150 3/4” 4.38” M 205,000 1,912,000
18C5118125 3/4” 7.56” M 205,000 1,619,000
18C5118150 3/4” 7.56” M 205,000 1,912,000
18C5123125 3/4” 2.88” F 185,000 1,619,000
18C5123150 3/4” 2.88” F 185,000 1,912,000
18C5125125 3/4” 4.56” F 205,000 1,619,000
18C5125150 3/4” 4.56” F 205,000 1,912,000
18C5128125 3/4” 7.75” F 205,000 1,619,000
18C5128150 3/4” 7.75” F 205,000 1,912,000
18C5213125 1” 3.06” M 500,000 1,825,000
18C5213150 1” 3.06” M 500,000 2,155,000
18C5215125 1” 4.75” M 500,000 1,825,000
18C5215150 1” 4.75” M 500,000 2,155,000
18C5225125 1” 4.75” F 750,000 3,070,000
18C5225150 1” 4.75” F 750,000 3,625,000
18C5228125 1” 8.13” F 750,000 3,070,000
18C5228150 1” 8.13” F 750,000 3,625,000
18C5314125 1-1/4” x 1” 3.97” M 750,000 3,070,000
18C5314150 1-1/4” x 1” 3.97” M 750,000 3,625,000
18C5424125 1-1/2” 4.13” F 1,200,000 5,125,000
18C5424150 1-1/2” 4.13” F 1,200,000 6,050,000
18C5513125 2” x 1-1/2” 3.25” M 1,200,000 5,125,000
18C5513150 2” x 1-1/2” 3.25” M 1,200,000 6,050,000
* National Board certied capacity per ASME Section IV-Heating Boilers
Series
Number
Inlet Size (in./mm.)
Dimensions (in./mm.)
A B C
18C511
3/4” M x 3/4” FNPT 1.50 3.47 2.53
(20) (40) (88) (64)
18C512
3/4” F x 3/4” FNPT 1.50 3.47 2.35
(20) (40) (88) (60)
18C521
1” M x 1” FNPT 1.56 3.47 2.38
(25) (40) (88) (60)
18C522
1” F x 1” FNPT 1.56 3.47 2.13
(25) (40) (88) (54)
18C531
1-1/4” M x 1” FNPT 1.75 4.34 1.91
(32) (44) (110) (49)
18C542
1-1/2” M x 1-1/2” FNPT 2.47 5.84 1.71
(40) (63) (148) (43)
18C551
2” M x 1-1/2” FNPT 2.47 5.84 259
(50) (63) (148) (66)
A
S
M
E
HV
Special statement regarding T&P Valves and compliance to the Lead Free requirements of the U.S. Safe
Drinking Water Act.
Eective January 4th 2014 the SDWA requires that pipes, ttings or xtures used to convey or dispense potable
water must be lead free. Further clarication has been provided by the EPA in a document titled “Summary of
the Reduction of Lead In Drinking Water Act and frequently Asked Questions”. The latest document can be
viewed on our website: www.apollovalves.com/lead_free; click on the NEW EPA FAQ link.
FAQ #6 states that water heaters are covered by the Act and must comply. However most water heater OEM’s
are certifying their heaters as complete assemblies using non-Lead Free T&P valves due to their relatively small
wetted surface area.
FAQ #23 acknowledges this and states that replacement parts (including T&P valves) need not be lead free
as long as the entire water heater with all installed components overall device would meet the Lead Free
requirements of the Act.
RELIEF VALVES
pressure & temperature