The 10-15L water Extinguisher Valve 1007E is designed for 10-15L fire extinguisher assemblies. It is the valve with a plastic handle and a copper body. The handle design is intended to reduce weight and provide resistance to corrosion in environments where a metal handle may be less convenient or less economical.
The G7/8 inlet thread is identified as a British thread standard and is intended to connect the valve to a compatible cylinder interface. The 9/16 UNF outlet thread can be matched with an appropriate discharge hose, nozzle, or outlet component. The 1/8 NPT gauge connection allows the use of a compatible pressure gauge for monitoring the internal pressure of the extinguisher.
The valve also uses an M16X1.5 dip tube connection. Correct dip tube selection is important because the tube arrangement must correspond to the extinguishing agent and the intended discharge orientation of the cylinder.
| Parameter | Specification |
| Valve Type | 10-15L water Extinguisher Valve |
| Material | High-quality Copper |
| Surface treatment | According to customer requirements (chrome/nickel plated) |
| Inlet thread | G7/8 |
| Outlet thread | 9/16 UNF |
| Gauge Connection thread | 1/8 NPT |
| Dip tube pipe thread | M16X1.5 |
| Safety Device (Bar) | No |
| Check Valve | No |
| Applicable Cylinder | 10-15L Fire Extinguisher |
| Customization | Thread configuration, surface finish, handle style, and other parameters upon request |
The 10-15L water Extinguisher Valve 1007E uses a combination of thread specifications. The G7/8 inlet and 9/16 UNF outlet should not be treated as interchangeable with visually similar metric threads. The 1/8 NPT gauge connection also requires a compatible pressure gauge and sealing arrangement.
Before ordering, the buyer should confirm:
1. The cylinder neck thread and sealing interface.
2. The outlet connection used by the discharge hose or nozzle assembly.
3. The pressure gauge thread and sealing method.
4. The dip tube connection and dimensions.
5. The applicable pressure and extinguishing-agent requirements.
A technical drawing is the most reliable way to prevent thread mismatch.
The G7/8 inlet must be matched with the corresponding cylinder neck thread. The outlet uses a 9/16 UNF connection, which should be checked against the hose or nozzle assembly before ordering. The 1/8 NPT gauge interface is different from metric gauge threads, so buyers should confirm the pressure gauge standard carefully.
The source document explains that properly matched threads can support stable connections and reduce the risk of leakage at the interface. However, final sealing performance depends on the complete assembly, sealing method, machining accuracy, and installation procedure.
G7/8 is a British Standard Pipe Parallel thread, with a nominal major diameter of approximately 30.2 mm and a pitch of 1.814 mm at 14 threads per inch. A parallel pipe thread does not seal on the thread flanks. The pressure-tight joint depends on a sealing face, an O-ring, a bonded washer, or a soft gasket at the cylinder neck. Buyers should verify the sealing method specified for the cylinder neck rather than relying on thread engagement alone.
The same logic applies to the 1/8 NPT gauge port. NPT is a tapered thread and seals by thread interference, usually with a sealant or tape applied according to the gauge manufacturer’s instruction. Mixing a parallel-thread sealing approach with a tapered port, or the reverse, is a common source of leakage complaints that are not attributable to the valve body itself.
Published assembly data for comparable EN 3-7 water extinguishers lists a valve tightening torque range of 40–60 Nm, with the actual value depending on the cylinder neck material and design. Torque outside the cylinder manufacturer’s specified range can deform the neck or compromise the seal. The 9/16 UNF outlet and the M16X1.5 dip tube connection each carry their own engagement and sealing requirements, and the assembly sequence should follow the finished extinguisher manufacturer’s procedure.
The plastic handle is a deliberate material choice rather than a lower-cost substitution. Engineering thermoplastics used in this role are typically POM (acetal) or a glass-filled PA66, both of which are selected for dimensional stability and resistance to the moisture and mild chemical exposure encountered in service. POM absorbs roughly 0.2% moisture in 24 hours, while unfilled PA66 absorbs in the range of 1–1.5%, with saturation values considerably higher. Lower moisture absorption generally translates into less dimensional change in humid storage or service conditions, which matters for a handle that must maintain a predictable fit with the valve stem and operating mechanism.
Neither material is immune to chemical attack. POM is sensitive to strong acids and to concentrated chlorine, and PA66 is attacked by acids and can degrade under prolonged exposure to certain additive packages in water-based extinguishing agents. Where the finished extinguisher uses a water additive or a foam concentrate, the handle material and the seal material should both be checked against the specific agent formulation rather than assumed compatible from a general “water-based” classification.
From an inspection standpoint, the plastic handle should be examined for stress whitening, cracking at the pivot or stem interface, and deformation after exposure to elevated storage temperature. These indicators are distinct from corrosion inspection of the copper body and belong in the same periodic service check.
During routine maintenance, service personnel should inspect:
1. Handle condition and secure attachment
2. Valve body for corrosion or impact damage
3. Thread areas for wear or deformation
4. Gauge connection for leakage
5. Outlet connection and discharge assembly
6. Dip tube connection and tube condition
7. Smoothness of the operating mechanism
Water-based portable extinguishers maintained under EN 3-7–aligned schedules commonly receive annual basic inspection, a 5-year extended service involving test discharge and recharge, and a 10-year overhaul with hydraulic test of the cylinder. The 10-year overhaul is also the point at which the valve is typically replaced rather than merely inspected. Intermediate replacement can still be required where the handle shows cracking, the gauge port leaks, the outlet threads are deformed, or the operating mechanism does not return cleanly.
Because this valve is supplied without an integrated safety device and without a check valve, the overpressure protection and any anti-backflow function must be provided elsewhere in the finished extinguisher assembly. During the 5-year and 10-year interventions, the service provider should confirm that those functions remain present and functional, not only that the 1007E itself passes a visual check.
The 10–15L designation refers to the nominal charge volume of the finished extinguisher, not to a single fixed cylinder size. Within that range, the dip tube length and the outlet configuration are the two variables most likely to require confirmation. A valve correct for a 10L cylinder may not produce the intended discharge pattern in a 15L cylinder if the dip tube is not matched to the internal depth and the discharge orientation. Buyers specifying across the full 10–15L range should request the dimensional drawing for the specific inlet and outlet combination and confirm dip tube length separately from the valve part number.
A: The supplied specification identifies 10–15L fire extinguishers.
A: 1/8 NPT.
A: The specification states “No” for the safety device and “No” for the check valve. Confirm the complete extinguisher design before ordering.
A: Handle style is listed as customizable upon request, subject to technical confirmation.
A: No. G7/8 is a British Standard Pipe Parallel thread with a major diameter of approximately 30.2 mm and 14 threads per inch. M30×1.5 is a metric thread with a 1.5 mm pitch. They share a similar nominal size but are not interchangeable at the thread level.
A: The handle is a moulded engineering thermoplastic, typically POM or a glass-filled PA66. Both are selected for low moisture-related dimensional change and resistance to mild chemical exposure. Service life is influenced more by exposure to strong acids, concentrated chlorine, or additive packages outside the material’s compatibility range than by normal water-based agent contact. The specific material grade and additive compatibility should be confirmed against the intended extinguishing medium.
Address
Factory: Huilong Village, Huangjiabu Town, Yuyao City, Zhejiang Province, China
Branch Office: Hengye Building 509, No.158 Tai'an Middle Road, Yinzhou District, Ningbo, Zhejiang, China
Tel
