What adapter do I need?
Pick what you have and what you're connecting it to. You get the exact adapter or supply line that fits.
The end that screws onto a faucet, with threads inside and a rubber washer
Male pipe thread (MIP), 1.05" across
What fits
3/4" MHT x 3/4" FIP adapter
On the package: 3/4 in. MHT x 3/4 in. FIP
male hose thread x female pipe thread, brass
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Why the obvious part often doesn’t fit
Plumbing parts are named by nominal size, a label rather than a measurement. A 3/4" garden hose thread is about 1-1/16" across, and 3/4" pipe thread is 1.05" across. They look the same, but the hose thread has 11.5 threads per inch and the pipe thread 14, so one won’t screw onto the other without an adapter. Drip tubing varies even more. Tubing sold as 1/2" comes in several real sizes, and the outside diameter decides which compression fitting to use.
Not sure what you’re holding?
Use Identify it: pick where the part is and answer a question or two, or measure it. It names the part and shows what connects to it.
Common questions
Will a garden hose screw onto a 3/4 inch pipe thread?
No. Garden hose thread (GHT) is about 1.06" across with 11.5 threads per inch; 3/4" pipe thread (NPT) is 1.05" across with 14, so the threads don't mesh. Use a 3/4" male hose thread x 3/4" female pipe thread (MHT x FIP) adapter. If the pipe part has threads inside, use MHT x MIP.
What does FHT x MIP mean on an adapter?
FHT is female hose thread (threads inside, like the end of a hose that goes on a spigot). MHT is male hose thread. MIP (or MPT, MNPT) is male pipe thread, threads on the outside; FIP (FPT, FNPT) is female pipe thread, threads inside. An adapter is named by its two ends.
Do I need thread tape on a garden hose adapter?
Not on the hose side: hose threads seal with the rubber washer in the female end. Put tape or pipe dope on the pipe-thread side only, because tapered pipe threads seal on the threads. Tape goes on the male (outside) pipe threads, wrapped the way the threads spiral.
Where we get our information from
The adapter names and thread sizes come from published thread standards and the makers’ own spec sheets, catalogs and instructions. Checked against published data from BrassCraft, SharkBite, Charlotte Pipe, International Code Council and Swagelok (plus 23 more).
See all 52 sources
- National Bureau of Standards, Handbook H28 (1957) Part II: Table VII.2 (American Standard taper pipe threads, NPT) and Tables X.1–X.3 (hose coupling threads, NH)
- Dixon Valve, Technical Information: Identifying Threads and Thread Dimensions (2009 catalog)
- Swagelok, Thread and End Connection Identification Guide (MS-13-77)
- BrassCraft, washing machine connector BL12-WA
- Anderson Metals and BrassCraft brass hose adapter listings (FHT x MIP, MHT x FIP and related)
- Copper Development Association, Copper Tube Handbook (ASTM B88 tube dimensions)
- Uponor, Plumbing Design Assistance Manual (PEX is copper tube size)
- BrassCraft, angle stop product pages (compression, FIP, sweat, PEX and push-connect inlets; 3/8", 7/16", 1/2" and 1/4" O.D. outlets; 1/2" nominal = 5/8" O.D.)
- Moen, faucet specification sheets (8884, 7385, 7790, 7594E)
- Kohler, faucet specification sheets (K-596, K-22036)
- Delta, RP63263 supply adapter (1/2"-14 NPSM)
- BrassCraft, faucet connector 3/8" comp x 1/2" FIP and submittal 400.335
- BrassCraft, toilet connector 3/8" comp x 7/8" ballcock and submittal 400.339
- Fluidmaster, faucet and toilet connector catalogs and Click Seal pages (FM91429, FM91233)
- BrassCraft, dishwasher (B1-DW, B1-60DW1) and ice maker (B0-IM) connectors
- BrassCraft, installation instructions for connectors (425.10, 425.07, B0120IMB) and water supply stops (425.04)
- Fluidmaster, fill valve instructions (400CARSP5): replace connectors over 5 years old
- DIG Corp., “Tubing & Fittings for Drip Irrigation”
- DIG Corp., “Starting a Drip System from a Faucet” and D45 backflow / D46 regulator pages
- Rain Bird, Faucet Connection Kit
- JM Eagle, PVC Schedule 40/80 submittal (ASTM D1785 outside diameters)
- Swagelok, Thread Sealants catalog (MS-14-01): PTFE tape, how to apply
- Boshart Industries, “How to Apply PTFE Thread Seal Tape”
- Neoperl, aerators with housings, aftermarket and manufacturer pages (thread sizes by insert size, including Tiny Junior and metric Standard) and “Replacing a faucet aerator”
- Danco, Multi-Fit Aerator Key instructions (10909): coin sizes and male/female aerators
- Delta, FAQ: connecting a portable dishwasher or water filter to a kitchen faucet (cache aerators, RP51505)
- Danco 10513 garden hose adapter, 15/16"-27M or 55/64"-27F x 3/4" GHTM (retailer listings)
- Orbit, PVC hose fittings 53360, 53361, 53362 and 53368
- Oatey, Solvent Welding Instruction Guide
- Generac, pressure washer owner’s manual (model 1540-0)
- Kärcher, K1800PS pressure washer and Quick Connect high-pressure hose
- Sun Joe, SPX-M22M2F 14mm M22 male to 15mm M22 female adapter
- Flexzilla, “What Causes a Leaky Garden Hose”
- SharkBite (Reliance Worldwide), SharkBite Installation Guide (2020): pipe insertion depth table, integral PEX stiffener
- SharkBite (Reliance Worldwide), SharkBite Max Installation Guide (2023): approved pipe, depths, removal, burial, warnings
- SharkBite (Reliance Worldwide), Push-to-Connect Installation Guide (pocket guide): stiffeners, transition fittings, warnings
- Reliance Worldwide, SharkBite PVC Fittings Sales & Specifications Sheet (2015): white collar fits Schedule 40, 80 and 120 PVC
- SharkBite (Reliance Worldwide), SharkBite PEX Installation Guide (2021): fits copper, CTS CPVC and PEX in any combination
- Uponor, PEX Piping Systems Installation Guide, seventh edition (2025): ProPEX expansion fittings, pipe colors, copper and threaded adapters, no soldering within 18" of PEX
- Charlotte Pipe, Plastics Technical Manual (2026): PVC and CPVC colors, standards, temperature limits, Not for Pressure print, plastic-to-metal threads and brass transition fittings
- Charlotte Pipe, FlowGuard Gold CTS CPVC submittal and product page: ASTM D2846, 180 F, solvent cement
- Michigan Administrative Code R 408.30727 and R 408.30729: Tables 605.4 (water distribution) and 605.3 (water service pipe)
- International Plumbing Code 2021, sections 605.23, 605.23.1 and 605.23.2: joints between different materials, copper to galvanized steel (as adopted in South Carolina)
- International Residential Code 2021, sections P2906.18 and P2906.18.1-P2906.18.3: joints between different materials, PVC service to CPVC (as adopted in South Carolina)
- Charlotte Pipe, Plastics Technical Manual (2026), product data: average outside diameter and minimum wall of PVC Schedule 40 and 80, PVC DWV, PVC and ABS foam core, 4" sewer and drain pipe, and CTS CPVC
- Charlotte Pipe, Cast Iron No-Hub Submittal Package (2026), Table 1: barrel and spigot outside diameters (CISPI 301, ASTM A888); shielded hubless couplings
- Charlotte Pipe, Cast Iron Service Weight Submittal Package (2025): hub and spigot pipe barrel outside and inside diameters (ASTM A74)
- International Plumbing Code 2018 (as adopted in Georgia and Oklahoma), 2021 and 2024 (as adopted in South Carolina), section 202 (building drain, building sewer) and sections 705.2, 705.3.2, 705.3.3, 705.10, 705.16 and 705.16.4: ABS, cast iron and PVC joints, joints between different materials, plastic to other piping, the one ABS to PVC solvent-cement joint (ASTM D3138)
- International Residential Code 2021, sections P3003.13 and P3003.13.4: joints between different drain materials, plastic to other piping, the one ABS to PVC solvent-cement joint (as adopted in South Carolina)
- Fernco, Standard Flexible Couplings page: series by pipe pair (1002 clay, 1056 cast iron, plastic or steel), outside diameter ranges per part, above and below ground, Strong Back RC for buried joints, 60 in-lb torque, ASTM C1173, not for pressurized water
- Fernco, Proflex shielded couplings page: above-ground DWV transitions, stainless steel shield, ASTM C1460, 3000 series cast iron to plastic and 3005 series plastic to plastic
- Oatey, ABS to PVC Transition Medium Bodied Green Cement product page: DWV-sewer, non-pressure transition joints up to 6", ASTM D3138
General guidance from manufacturer and standards data. Parts vary by brand, so check the size printed on the package against what you measured. For gas lines or anything inside a wall, use a licensed plumber.