| BODY: | Cast Iron per ASTM A126, Class B. |
| SEAT: | Bronze per ASTM B584, CDA-836. |
| PLUG: | Bronze per ASTM B584, CDA-836. |
| SPRING: | Type 304 (18-8) Stainless Steel per ASTM A313. |
| BUSHING: | Bronze per ASTM B584, CDA-932. |
| RETAINING SCREW: | Type 304 (18-8) Stainless Steel per ASTM A276. |