Malleable cast iron male and female union (Taper seat / flat seat) is a detachable pipe fitting designed for secure, leak-proof connections in a wide range of piping systems. Constructed from high-quality malleable iron, it consists of three components: a union nut, a female-threaded head part, and a male-threaded tail part. Ideal for plumbing, gas, water, and industrial pipelines, this union ensures easy installation, permits quick disassembly for maintenance, and provides exceptional durability and long-term strength.
Available size (Source 1 with FM)
| Size | A (mm) | Type | Ref. No. |
|---|---|---|---|
| 1/2″ / DN15 / 21.3mm | 66 | Taper seat / flat seat | M3903 (FM) |
| 3/4″ / DN20 / 26.9mm | 72 | Taper seat / flat seat | M3904 (FM) |
| 1″ / DN25 / 33.7mm | 80 | Taper seat / flat seat | M3905 (FM) |
| 1-1/4″ / DN32 / 42.4mm | 90 | Taper seat / flat seat | M3906 (FM) |
| 1-1/2″ / DN40 / 48.3mm | 95 | Taper seat / flat seat | M3907 (FM) |
| 2″ / DN50 / 60.3mm | 106 | Taper seat / flat seat | M3908 (FM) |
| 2-1/2″ / DN65 / 76.1mm | 118 | Taper seat / flat seat | M3909 (FM) |
| 3″ / DN80 / 88.9mm | 130 | Taper seat / flat seat | M3910 (FM) |
| 4″ / DN100 / 114.3mm | 133 | Taper seat / flat seat | M3911 (FM) |
Note:
1. For taper (conical) seat, it is self-sealing without gasket. A brass ring is press-fitted to enhance the sealing performance.
2. For flat seat, it requires a separate gasket for sealing. TPMC could supply the rubber gasket as an optional accessory.
Available size (Source 2 with UL)
| Size | A (mm) | Type | Ref. No. |
|---|---|---|---|
| 1/2″ / DN15 / 21.3mm | 65 / 64 | Taper seat / flat seat | M3923 (UL) |
| 3/4″ / DN20 / 26.9mm | 72 / 70 | Taper seat / flat seat | M3924 (UL) |
| 1″ / DN25 / 33.7mm | 79 / 78 | Taper seat / flat seat | M3925 (UL) |
| 1-1/4″ / DN32 / 42.4mm | 90 / 88 | Taper seat / flat seat | M3926 (UL) |
| 1-1/2″ / DN40 / 48.3mm | 96 / 93 | Taper seat / flat seat | M3927 (UL) |
| 2″ / DN50 / 60.3mm | 107 / 104 | Taper seat / flat seat | M3928 (UL) |
Note:
1. For taper (conical) seat, it is self-sealing without gasket. A brass ring is press-fitted to enhance the sealing performance.
2. For flat seat, it requires a separate gasket for sealing. TPMC could supply the rubber gasket as an optional accessory.
3. This UL listed union is certified to NSF/ANSI/CAN 61 for use in drinking water systems.
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