Best 1 1 2 Npt to Garden Hose Adapter Options

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A 1 1 2 npt to garden hose adapter connects a 1.5 inch pipe thread to a standard garden hose thread, so a hose can attach to a pump outlet or a pipe fitting. The threads are different types, so the wrong pair will not seal. This guide covers the three adapters covered here that have a 1.5 inch NPT end. It explains the thread names, the material choice between PVC and brass, and the sizing notes each listing gives, so you can order the right piece the first time.

At a glance: the 3 adapters, by their own spec fields

Pick	Thread	Material	Weight	Notable flag
Van Enterprises (single PVC)	1.5″ NPT male x 3/4″ GHT	Polyvinyl Chloride	13.61 g	No pressure rating given; sizing rule: if OD is 1.85″, buy this 1.50″ adapter
PEUTIER (2-piece PVC set)	1.5″ NPT, 3/4″ (field reads “M” for size)	PVC	Not stated	No primer/solvent glue needed per bullets; no pressure limit given
Hooshing (brass)	1.5″ NPT x 3/4″ GHT (title/size); Thread Type field reads GHT only	Brass	0.16 kg	Thread Type field conflicts with title/size field; OD given as ~1″ x 1.86″, described as nominal not actual

Specs are from each product’s Amazon listing, checked 2026-10-11 (full citations in this guide’s sources section). None of the three listings states a pressure rating, and the Hooshing listing’s own fields disagree on thread type — confirm the outside diameter against your pump or fitting before ordering.

Quick answer

Match the thread first. The 1.5 inch NPT male end fits the pipe side, and the 3/4 inch GHT male end fits the garden hose. Two of the three adapters here are PVC, and the Hooshing adapter is brass. Choose PVC for a sump pump or pool outlet if you want a lighter piece with no glue needed. Choose brass if you are connecting to a faucet or a hose fitting. Measure the outside diameter before you buy, because the thread names are nominal sizes and not measured diameters.

What matters for a 1 1 2 npt to garden hose adapter

Only three adapters in this group carry the 1.5 inch NPT thread, so this roundup covers three picks. Compare them on these details.

• Thread on each end. NPT is the pipe end and GHT is the garden hose end. A listing that names both ends by size is the one to trust. The Hooshing title names both, but its Thread Type field reads GHT alone.
• Nominal size versus real size. The Hooshing bullets say the thread size is a nominal pipe size and does not represent the actual diameter. The Van listing gives a sizing rule: if the outside diameter is 1.85 inch, buy the 1.50 inch adapter.
• Material. The Van and PEUTIER adapters are PVC. The Hooshing adapter is brass and copper-colored, with a weight of 0.16 kg in its specs.
• Seals. Small rubber or plastic washers sit in the female end of a hose connection to stop leaks, because the threads do not seal by themselves. No washer appears among the features of these three adapters, so check the package contents before you connect.
• Pack size. The PEUTIER listing sells two pieces in one set. The Van and Hooshing listings are single pieces. The two PVC listings share the same listed thread sizes, so material and pack size are the main differences between them.

The three adapters compared

Van Enterprises PVC adapter for pump outlets

This is a single PVC adapter with a male 1.5 inch NPT end and a 3/4 inch GHT thread. Its bullets name sump pumps and pool pumps as intended uses, and the title says the same. The listing gives a sizing rule that is useful at the counter: if the outside diameter is 1.85 inch, buy this 1.50 inch adapter. Its specs list the material only as polyvinyl chloride, with dimensions of 2 x 2 x 2 inches and a weight of 13.61 g. The bullets also list other sizes from 1/2 inch to 1.5 inch, so confirm which size your pump outlet needs. The listing gives no pressure rating, so do not assume one.

PEUTIER PVC adapter set

The PEUTIER listing is a two-piece set of PVC adapters with a male 1.5 inch NPT end and a 3/4 inch GHT thread. The Set Name and Number of Pieces fields both confirm the pair. The bullets say you do not need primer or solvent glue to install, and they name sewer systems, drain vents, swimming pools and irrigation as uses. The Size field reads M and does not describe dimensions, so rely on the Thread Size field instead. A two-piece set helps if two outlets need the same adapter. It is a poor pick if you need one brass fitting for a faucet.

Hooshing brass adapter

The Hooshing adapter is the only brass option in this group. Its title names a 1-1/2 inch NPT male end and a 3/4 inch GHT male end, and its Size field reads 1.5 inch NPT by 3/4 inch GHT. Its bullets give an outside diameter of about 1 inch by 1.86 inch, and they say the thread size is nominal and not the actual diameter. The Thread Type field reads GHT alone, which does not match the title. The bullets mention brass that resists corrosion and a heavy-duty design, but no washer is named. Its weight in the specs is 0.16 kg.

How to choose

Use these rules to pick one of the three adapters.

• Choose the PVC pick for a pump or pool outlet if you want a lighter adapter that installs without glue. The Van and PEUTIER listings both name pump uses.
• Choose the brass pick for a faucet or metal hose fitting. Brass is the only material among the three that the listings describe as metal.
• Choose the two-piece PEUTIER set if you need the same adapter at two outlets.
• Choose the Van listing if you want the clearest sizing rule on the page.
• Skip any adapter whose thread names do not match the fitting you already have.

If none of the three fits your fitting, this group has no other 1.5 inch NPT option, so keep looking before you order a different size. The listed weights also differ widely: 0.16 kg for the brass piece against 13.61 g for the single Van piece, which may matter if the adapter sits on a fixed fitting for years.

Measure before you order. Check the outside diameter of the pipe or fitting you will connect to, and compare it with the sizing rule in the Van bullets. Look at the thread on the fitting, and confirm whether it is NPT or GHT. Do not rely on the nominal name alone, because the Hooshing bullets say that name is not the actual diameter.

Think about the connection you are making. A pump outlet on a sump or pool system carries water under the pump’s pressure, so the adapter should match the outlet exactly. A faucet connection carries the household supply, so a metal fitting may suit that spot better. No pressure rating is given for these adapters, so check the manual for the pump or faucet before you connect.

Read the fitting labels as well as the title. Thread names such as 1.5 inch NPT are nominal sizes, which the Hooshing bullets say directly. A 3/4 inch GHT end is a garden hose thread, so check both ends by thread type and not by the number alone. If you have the fitting you are replacing, compare its ends with the listing before you order, and bring a note of the thread names to the store if you buy in person.

If your connection is a sump pump, the sump pump adapter guide covers the same use from another angle. For a faucet, the kitchen sink faucet adapter guide covers that connection. For a PVC pipe run, the PVC pipe to garden hose guide explains the pipe side of the same problem.

What the listings leave out

Several details that matter for a connection are missing from all three listings. None gives a pressure rating, so the pump or faucet manual sets the limit. None gives a temperature range. None of the listing text shows a thread drawing, so the thread names are the main guide. None names a washer as included, even though the washer is the part that seals the female end of a hose connection. Those gaps apply to every pick, so they do not separate one adapter from another. Treat them as questions to answer with the manufacturer of the pump or faucet.

Worked example

Here is one planning scenario. If you buy the two-piece PEUTIER set for the two pump outlets, you still need 2 more for the hoses. 4 minus 2 = 2 adapters. Check the hose end on each set before you buy, since the hose side is the 3/4 inch GHT thread in all three listings. Count the outlets and hoses again before you place the order, and keep the count on paper while you shop so the order matches the connection points.

Mistakes to avoid

• Mixing up NPT and GHT. The NPT end is the pipe side and the GHT end is the hose side. A GHT thread will not seal on an NPT pipe, and the reverse is also true.
• Trusting the nominal size. The Hooshing bullets state that the thread size does not represent the actual diameter. Measure before you order.
• Skipping the washer. No washer is named for these three adapters. Check the contents, and confirm that a washer is in place at each female connection.
• Assuming a pressure rating. No pressure rating appears for these adapters, so check the pump or faucet manual before you connect.
• Using an adapter outside its material choice. PVC suits the pump and drain uses the bullets name. A faucet connection may call for the metal fitting instead.
• Ordering from the title alone. The Hooshing title names both NPT and GHT, but its Thread Type field reads GHT alone. Check the fields as well as the title before you order, and ask the seller if they disagree.
• Counting only the pump outlets. Every connection point needs its own adapter, including the hose end of each run. The worked example shows how a short count leaves you without a piece for the second hose.

FAQ

What does 1 1 2 npt mean on an adapter?

It names a pipe thread of 1.5 inch nominal size, which is the male end of the adapter in these listings. The name is not a measured outside diameter, so check the diameter before you buy.

Is NPT the same as GHT?

No. NPT is a pipe thread and GHT is a garden hose thread. The Hooshing bullets say the two are different thread types, and the adapter must have one of each.

Can I use a PVC adapter on a faucet?

The PVC listings name pump and drain uses. For a faucet connection, the Hooshing brass adapter is the only pick in this group that lists metal construction, so check the faucet manual before you choose.

Do I need glue to install a PVC adapter?

The PEUTIER bullets say no primer or solvent glue is needed. Check the thread fit and the washer at each connection, and follow the pump manual for any other requirement.

Why does the size name not match the diameter?

Thread names are nominal pipe sizes, so the measured outside diameter can differ from the name. The Van listing says to buy the 1.50 inch adapter if the outside diameter is 1.85 inch, which shows how the two can differ.

Does the PVC material matter for a sump pump?

PVC is used in construction for pipes, and rigid PVC is the form used for plumbing. The PEUTIER and Van listings both name PVC, and the pump manual should confirm that PVC suits the outlet.

How many adapters should I buy?

Count each connection point, and buy one adapter for each. The worked example shows that counting the outlets and hoses first avoids a short order.

Is a brass adapter better than PVC?

Neither is better in every case. Brass suits a metal fitting, and PVC suits the pump and drain uses named in the PVC listings. Choose by the fitting you are connecting to.

Bottom line

For a pump or pool outlet, choose one of the two PVC picks. Choose the Van listing for a single adapter with a clear sizing rule, or the PEUTIER set for two adapters at once. For a faucet or metal hose fitting, choose the Hooshing brass adapter. Measure the outside diameter and confirm the thread on each end before you order, and check the pump or faucet manual for pressure limits.

Sources

• Garden hose, Wikipedia: small rubber or plastic washers are used in the female ends of garden hoses to prevent leakage, because the threads are not sealed by themselves.
• Polyvinyl chloride, Wikipedia: rigid PVC is used in construction for pipes, and plasticizers make it softer and more flexible.