Description
Forestry Instantaneous Nylon Male Pipe (NPSH) Adapter, Quarter-Turn, 1-1/2
Forestry Instantaneous Male NPSH Adapter Overview
This 1-1/2" nylon forestry instantaneous male NPSH adapter connects forestry hose couplings to female NPSH (National Pipe Straight Hose) ports on nozzle bases, hose swivels, and valve inlets. The male NPSH end threads into the port hand-tight with no tape or sealant, and the forestry end locks onto the hose with a quarter turn.
Constructed from nylon, this nylon male NPSH forestry coupling weighs 0.25 lb, less than half the weight of the aluminum version. The bright yellow body stands out against dirt, ash, and tangled hose, making connection points easier to find on the fire line and in low-light conditions.
The forestry instantaneous end is genderless, so both halves are the same part. This adapter cross-mates with 3/4", 1", and 1-1/2" forestry hose, so one fitting connects to any forestry hose size on the line.
Specifications
Specifications for the 1-1/2 nylon male NPSH forestry fitting (G86N-150):
| Specification | G86N-150 |
|---|---|
| SKU | G86N-150 |
| Fitting Type | Forestry Instantaneous x Male 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" Male NPSH (straight thread, external) |
| 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 End, All Three Hose Sizes
Forestry instantaneous couplings have no male or female side. Every half is the same part. This quarter-turn male NPSH forestry fitting cross-mates with 3/4", 1", and 1-1/2" forestry hose, so one adapter works with any forestry hose diameter.
Male NPSH Threads Into Female NPSH Ports
The male NPSH end threads into female NPSH ports on fire hose couplings, nozzle bases, and valve inlets. This forestry coupling to male NPSH pipe adapter seals against the gasket inside the receiving female fitting. Hand-tight, no tape or sealant.
0.25 lb Nylon, Less Than Half the Weight of Aluminum
This nylon male NPSH forestry coupling weighs 0.25 lb. The aluminum version at 1-1/2" weighs approximately 0.60 lb. Ten 1-1/2 nylon male NPSH forestry fittings in a wildland fire cache save over three pounds compared to aluminum at the same 300 PSI rating.
Yellow Nylon, Visible on the Fire Line
Yellow nylon stands out against dirt, ash, and tangled hose. Crews find this wildland fire hose male NPSH adapter in cache bags and equipment piles at the staging area even in smoke or low light.
300 PSI, Matches Forestry Pumps and Fire Hose
Rated at 300 PSI at 70°F (21°C). This male NPSH fire hose adapter matches the working pressure of portable forestry pumps and double-jacket fire hose. The nylon body holds that rating at both the forestry end and the male NPSH thread.
How to Connect a Forestry Hose to a Female NPSH Port
These steps connect a forestry hose line to equipment with a female NPSH port:
- Confirm the port has internal threads (threads inside a recess). Internal threads indicate a female NPSH port that accepts this male adapter. If the port has external threads (threads sticking out), use the female NPSH adapter (G87N-150) instead.
- Thread the male NPSH end of the adapter into the female port. Turn clockwise until hand-tight. The gasket inside the female fitting 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 valve or pump slowly to pressurize the line. Check the NPSH gasket joint and the forestry coupling for leaks before opening to full flow.
Male NPSH vs Male NPT Forestry Adapter: Which Thread Fits Your Equipment?
Both male NPSH and male NPT forestry adapters connect forestry hose to threaded equipment in wildland fire and forestry operations, but the two thread standards seal differently. At 1-1/2", both use 11.5 threads per inch, so the threads look similar and physically engage each other.
NPSH is a straight (parallel) thread that seals with a gasket inside the female fitting. NPT is a tapered thread that seals with tape or pipe sealant applied to the male threads.
When You Need Male NPSH (This Product, G86N-150)
Use this forestry coupling to male NPSH adapter when the equipment port is labeled NPSH. Common equipment with female NPSH ports:
- Fire hose couplings (female NPSH swivel nuts)
- Nozzle bases with female NPSH inlets
- Pump suction ports with female NPSH threads
- Valve inlets with female NPSH connections
- Hydrant adapters with female NPSH ends
When You Need Male NPT
Use a male NPT forestry adapter when the equipment port is labeled NPT, FPT (female pipe thread), or pipe thread. Common equipment with female NPT ports:
- Plumbing pipe fittings and bulkhead connections
- Industrial pipe connections
- Some older pump ports
- Tank outlets with female NPT threads
Quick Comparison
| Feature | Male NPSH (G86N-150) | Male NPT |
|---|---|---|
| Thread Profile | Straight (same diameter base to tip) | Tapered (narrows toward tip) |
| Seal Method | Gasket in female fitting (hand-tight) | Thread tape or pipe dope (wrench-tight) |
| Tools Required | Hand-tight only | Wrench for final tightening |
| Typical Equipment | Fire hose, pumps, nozzles, valves | Plumbing, industrial pipe, tanks |
| Reusable Connection | Yes (gasket is replaceable) | Limited (sealant must be reapplied) |
| TPI at 1-1/2" | 11.5 | 11.5 |
If the thread standard is not marked on the equipment, check the thread profile. A straight thread that measures the same diameter at the base and tip confirms NPSH. A thread that narrows toward the tip confirms NPT.
Applications
- Municipal fire departments stocking a male NPSH fire hose adapter in brush truck forestry kits for wildland-urban interface calls connecting forestry hose to female NPSH nozzle bases
- Wildland firefighting crews threading a nylon male NPSH forestry coupling into female NPSH hose swivels for fast hose connection at remote water sources
- Water delivery contractors connecting a forestry coupling to male NPSH pipe adapter to female NPSH valve inlets on nurse tanks and portable pump skids
- Provincial and state forestry agencies caching a wildland fire hose male NPSH adapter with seasonal pump kits for standby fire suppression readiness
- Emergency management and disaster relief teams using this forestry instantaneous to male pipe thread adapter for basement dewatering, flood control, and emergency pump hookups
Buy Nylon Forestry Male NPSH Adapters Online from Cleanflow
Cleanflow Utility Supply Company stocks the G86N-150 forestry instantaneous male 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 female NPSH forestry adapter (G87N-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?
Forestry instantaneous couplings are sexless fire hose fittings where both halves are the same part, with no separate male or female ends. Each half connects with a quarter-turn. The three standard sizes (3/4", 1", and 1-1/2") cross-mate, so a 1" forestry hose can lock directly onto this 1-1/2" adapter on the same line.
Is nylon or aluminum better for a forestry adapter?
Nylon resists corrosion completely, absorbs impact without denting, and weighs 0.25 lb versus approximately 0.60 lb for the aluminum version at 1-1/2". Aluminum withstands higher heat and holds UL and NFPA certifications required for structural fire suppression. A nylon male NPSH forestry coupling suits wildland and forestry work where corrosion and pack weight matter more than heat tolerance. Choose aluminum when the application requires a UL listing or sustained high-temperature exposure.
What threads does the male NPSH end connect to?
The male NPSH ends threads into any female fitting with 1-1/2" diameter and 11.5 threads per inch. Female NPSH fittings engage fully with a gasket seal. Female NPT fittings physically accept the threads (both use 11.5 TPI at 1-1/2"), but NPT seals on the taper with sealant, not with a gasket. The straight NPSH thread does not wedge into the NPT taper, so the joint leaks under pressure. This forestry instantaneous to male pipe thread adapter seals most reliably in female NPSH ports.
Can I connect this adapter to a 3/4" or 1" forestry hose?
This nylon male NPSH forestry coupling has a 1-1/2" forestry instantaneous end, but forestry instantaneous couplings of all sizes cross-mate. A 3/4" or 1" forestry hose coupling locks onto this quarter-turn male 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 male or female NPSH forestry adapter?
Look at the equipment port. If the port has internal threads (threads inside a recess), it is a female port, and you need this male NPSH adapter (G86N-150) to thread into it. If the port has external threads (threads sticking out), it is a male port, and you need the female NPSH adapter (G87N-150). Fire hose couplings and nozzle bases typically have female NPSH ports. Pump discharge ports are typically male NPSH.
Similar Products
Featured collection
