Description
Forestry Instantaneous Nylon Female Pipe (NPSH) Adapter, Quarter-Turn, 1-1/2
Product Overview
A forest fire fighting crew runs hose from a portable pump with a male NPSH discharge port. The forestry hose has instantaneous couplings that do not thread onto NPSH. This forestry instantaneous female NPSH adapter connects the two systems with a single fitting. The forestry end locks to the hose with a quarter-turn, and the female NPSH end threads onto the pump's male port. Weighs 0.25 lb in high-visibility yellow nylon.
Specifications
Specifications for the 1-1/2 nylon forestry fire hose fitting (G87N-150):
| Specification | G87N-150 |
|---|---|
| SKU | G87N-150 |
| Fitting Type | Forestry Instantaneous x Female NPSH Adapter |
| Size | 1-1/2" |
| Material | Nylon |
| Color | High-Visibility Yellow |
| Weight | 0.25 lb |
| Forestry End | 1-1/2" Forestry Instantaneous (quarter-turn, sexless/interchangeable) |
| Thread End | 1-1/2" Female NPSH (straight thread, gasket seal) |
| NPSH Thread TPI | 11.5 |
| Max Working Pressure | 300 PSI at 70°F (21°C) |
| Connection Style | Quarter-Turn Interchangeable |
|
Includes |
Expansion ring |
Key Features
Quarter-Turn Forestry Connection Without Separate Male and Female Halves
Both halves of a forestry instantaneous coupling are identical, so there are no dedicated male or female forestry ends to sort. This quarter-turn female NPSH forestry fitting locks onto any 3/4", 1", or 1-1/2" forestry hose end and cross-mates with all three sizes.
Female NPSH Thread Onto Pump Discharge and Outlet Ports
The female NPSH end threads onto male NPSH ports found on portable pump discharges, water thief outlets, and wye valve outlets. This forestry coupling to female NPSH pump adapter seals with a gasket inside the female thread, so the connection tightens hand-tight without tape or pipe sealant.
Nylon at 0.25 lb for Carry-In Forestry Operations
At 0.25 lb, this nylon female NPSH forestry coupling weighs less than half of the aluminum equivalent (approximately 0.60 lb at 1-1/2"). Crews packing a 1-1/2 nylon forestry fire hose fitting into remote wildland fires carry less weight per adapter without losing the 300 PSI pressure rating.
High-Visibility Yellow for Fire Line Identification
The bright yellow nylon body stands out against dirt, ash, and brush on the fire line. A wildland fire hose female NPSH adapter in yellow is faster to locate in low-light conditions and in the tangle of hose at a pump staging area.
300 PSI Working Pressure for Forestry Pump Systems
The forestry instantaneous standard holds 300 PSI at 70°F (21°C), matching the operating range of portable forestry pumps and double-jacket forestry hose. This female NPSH fire hose adapter holds that pressure rating at both the forestry end and the NPSH thread.
How to Connect a Forestry Hose to a Female NPSH Pump
These steps connect a forestry hose line to a portable pump with a male NPSH discharge port:
- Confirm the pump port has external threads (threads sticking out). External threads indicate a male NPSH port that accepts this female adapter. If the port has internal threads (threads inside a recess), use the male NPSH adapter (G86N-150) instead.
- Thread the female NPSH end of the adapter onto the pump's male port. Turn clockwise until hand-tight. The gasket inside the female thread compresses against the male thread face to seal without tape or sealant.
- Align the forestry instantaneous end of the adapter with the forestry coupling on the hose. Push the two halves together and give a quarter-turn to lock. The lugs seat into position when fully engaged.
- Open the pump discharge valve slowly to pressurize the line. Check the NPSH gasket joint and the forestry coupling for leaks before opening to full flow.
Female NPSH vs Male NPSH Forestry Adapter: Which One Fits Your Equipment?
The NPSH thread direction on a forestry adapter determines which equipment port it connects to. A female NPSH adapter threads onto a male port (external threads). A male NPSH adapter threads into a female port (internal threads). The forestry instantaneous end is identical on both adapters.
When You Need the Female NPSH Adapter (This Product, G87N-150)
Use this forestry coupling to the NPSH adapter when the equipment port has external threads. Common equipment with male NPSH outlets:
- Portable pump discharge ports
- Water thief outlets
- Wye valve outlets
- Inline tee outlets
- Hydrant adapters with male NPSH ends
When You Need the Male NPSH Adapter (G86N-150)
Use the male NPSH forestry adapter (G86N-150) when the equipment port has internal threads. Common equipment with female NPSH inlets:
- Pump suction inlets
- Some nozzle bases
- Valve inlets with internal thread
- Female NPSH hose couplings
Quick Comparison
| Feature | Female NPSH Adapter (G87N-150) | Male NPSH Adapter (G86N-150) |
|---|---|---|
| Thread Direction | Threads ONTO external (male) ports | Threads INTO internal (female) ports |
| Common Equipment | Pump discharge, water thief, wye valve | Pump suction, nozzles, valve inlets |
| Thread Versatility | Engages male NPSH, NPT, NPTF, NPSM | Connects to female NPSH only |
| Forestry End | Identical (sexless quarter-turn) | Identical (sexless quarter-turn) |
Applications
- Wildland firefighting crews connecting a nylon female NPSH forestry coupling to portable pump discharge ports for rapid hose deployment in remote terrain
- Provincial and state forestry agencies outfitting field caches with a wildland fire hose female NPSH adapter for seasonal fire suppression operations
- Municipal fire departments adding a female NPSH fire hose adapter to forestry hose kits for brush fire and wildland-urban interface response
- Water delivery contractors using a forestry coupling to female NPSH pump adapter to connect forestry hose to pump discharge ports on tanker trucks and trailer-mounted pumps
- Emergency management teams stocking this forestry instantaneous to female pipe thread adapter for flood control, dewatering, and disaster relief pump operations
Buy Nylon Forestry Female NPSH Adapters Online from Cleanflow
Cleanflow Utility Supply Company stocks the G87N-150 forestry instantaneous female NPSH adapter for forest fire fighting crews, forestry agencies, and municipal departments across Canada and the United States. Order with free shipping on orders over $199 and a 30-day return policy.
Browse the male NPSH forestry adapter (G86N-150) for the opposite thread direction and the fire hose and fittings collection. Email info@cleanflow.ca for volume pricing.
Frequently Asked Questions
What is a forestry instantaneous coupling?
A forestry instantaneous coupling is a sexless (interchangeable) fire hose fitting that connects with a quarter-turn. Both halves are identical, so there are no separate male and female forestry ends. All forestry instantaneous sizes (3/4", 1", and 1-1/2") cross-mate with each other, allowing crews to connect different hose diameters on the same line.
Is nylon or aluminum better for a forestry adapter?
Nylon weighs less (0.25 lb vs approximately 0.60 lb for aluminum at 1-1/2"), resists corrosion completely, and absorbs impact without denting. Aluminum handles higher heat and carries UL and NFPA certification for structural firefighting. For wildland and forestry operations where weight and corrosion matter more than heat exposure, a nylon female NPSH forestry coupling is the lighter option. Where UL listing or high-heat conditions apply, use the aluminum version.
What threads does the female NPSH end accept?
The female NPSH ends threads onto any male fitting with 1-1/2" diameter and 11.5 threads per inch. Male NPSH threads engage fully with a gasket seal. Male NPT and NPTF threads physically engage the same thread pitch, but the taper on NPT can prevent the gasket from seating fully under high pressure. Male NPSM (straight machine thread) also engages. This forestry instantaneous to female pipe thread adapter seals most reliably on male NPSH ports.
Can I connect this adapter to a 3/4" or 1" forestry hose?
The forestry instantaneous end on this adapter is 1-1/2", but forestry instantaneous couplings of all sizes cross-mate. A 3/4" or 1" forestry hose coupling locks onto this quarter-turn female NPSH forestry fitting with a push and twist. The flow path narrows to the smaller coupling's bore, which reduces flow volume through the connection.
Do I need a female or male NPSH forestry adapter?
Look at the equipment port. If the port has external threads (threads sticking out), it is a male port, and you need this female NPSH adapter (G87N-150) to thread onto it. If the port has internal threads (threads inside a recess), it is a female port, and you need the male NPSH adapter (G86N-150). Portable pump discharge ports are typically male NPSH. Pump suction inlets are typically female NPSH.
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