In-stock parts
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In-stock parts
Order by 2PM MST
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2045 West Buckeye Road
Phoenix AZ 85009
United States
Apollo 20-104-03 includes one top valve and one bottom valve. Gauge glass and guard rods are not included.
This standard-pattern bronze water-gauge valve set provides the upper and lower connections for a liquid-level sight glass. It has 1/2-inch male NPT vessel connections, accepts 5/8-inch outside-diameter gauge glass, and uses aluminum handwheels for manual operation.
The -03 configuration supplies the two valves without the glass and rods supplied in a complete -00 gauge. Use it when you need the valve pair and will select the remaining gauge components for the installation. It is not a box of two identical top valves or two complete gauge sets.
| Specification | Detail |
|---|---|
| Manufacturer part number | 20-104-03 |
| Series | Apollo 20-100, standard pattern |
| Valve body / handwheels | Bronze / aluminum |
| Vessel connection | 1/2-inch male NPT |
| Gauge-glass connection | 5/8-inch outside diameter |
| Glass packing | EPDM |
| Valve pressure-temperature ratings | 300 psig at 100°F; 125 psig at 350°F, subject to gauge-glass limitations |
| Component | Supply configuration |
|---|---|
| Upper valve | One included |
| Lower valve | One included, with 1/4-inch needle drain |
| Gauge glass | Not included; select the correct diameter, length and service rating. |
| Guard rods | Not included; select the appropriate protective components. |
| Automatic ball checks | Not part of the standard 20-104 configuration; do not confuse it with the automatic 20-150 series. |
The operating limit belongs to the complete gauge assembly, not just the bronze valves. Gauge-glass size, length, material and seals can reduce the allowable pressure or temperature. Have trained personnel select and install the assembly, and use the required protection against glass breakage.
| Check | Ordering guidance |
|---|---|
| Vessel tappings and glass | Confirm 1/2-inch female NPT tappings, 5/8-inch glass outside diameter and the required installed glass length. |
| Service conditions | Check fluid compatibility and the pressure-temperature limits of the valves, glass and seals together. |
| Lead-free requirement | This is the standard bronze model, not a 20LF lead-free model. Do not select it when a lead-free valve is required. |
| Installation and maintenance | Use new gauge glass and glass packings. Do not overtighten glass nuts or clean the gauge while pressurized. Follow Apollo installation instructions. |
Need help completing a water-gauge assembly? Contact UnitedBuilt through online chat, email parts@unitedbuilt.com, or call 602-253-7750 with your connection size, required glass length and service conditions.
| Model Number | 20-100 |
|---|---|
| Weight | 1.06 lb |