1/8 Inch Flo-Thru Brass Quick Connect

Product Overview

Unvalved brass quick connect in 1/8 inch, with a female pipe thread.

1/8 inch is the hand-tool and sprayer size in this trade — upholstery handpieces, small tools and sprayer lines, where flow demand is under a gallon a minute and a light, low-snag fitting matters more than maximum flow. Solution hose and wands use 1/4 inch.

Flo-Thru or Valved?

A standard quick connect has an internal poppet that shuts off when you uncouple, so the hose does not empty. That poppet is a restriction, and every restriction upstream of a jet costs pressure.

A flo-thru coupling has no valve. The bore is clear, flow is unrestricted and pressure drop is minimal. The trade-off is that the line drains when you uncouple it.

Choose flo-thru where flow and pressure matter more than convenience — high pressure work, hot solution lines, and any tool already marginal at the jet. Choose valved where the drip is the bigger problem.

Check Both Ends Before Ordering

Quick connect naming is genuinely inconsistent across this range, and it causes more wrong orders than anything else in the fittings catalogue. The word "male" or "female" can refer to either the coupling end or the pipe thread, depending on the part.

So do not order on the title alone. Every specification table below spells out both ends separately. If you are matching an existing fitting, tell us what it screws into and we will confirm before you order.

Thread Standard — Read This If You Are Mixing Brands

These are American-pattern fittings and the threads are NPT, not BSP. On the parts where the manufacturer states a form it is NPT or NPTF (Dryseal), which is dimensionally NPT with a modified crest and root so it seals metal to metal.

NPT and BSP are close enough to catch people out. NPT is a 60 degree thread form; BSP is 55 degrees. At 1/4 inch and 3/8 inch, NPT is 18 threads per inch and BSP is 19. An NPT male will wind several turns into a BSP female and feel tight — then leak under pressure, because only a thread flank or two is actually bearing.

That matters here more than it does on a garden tap. A leak on a solution line is hot water at pressure. If you are adapting to anything BSP, use a proper adaptor rather than forcing the two together.

Specifications

Frequently Asked Questions

Which end is male, which is female?

On this part the quick connect end is female coupler and the pipe thread is 1/8 inch fpt (female). Naming in this range is inconsistent, so always read both.

Will it couple to other brands?

1/4 inch and 1/8 inch couplings in this trade are generally cross-compatible. Couple them dry and check the fit before putting pressure through.

What pressure is it rated to?

Hydro-Force does not publish a pressure or temperature rating for its quick connects. We are not going to borrow a figure from a different manufacturer's coupling. If you need a rating, contact us and we will request it.

Flo-thru or valved — which do I want?

Flo-thru if you are chasing pressure at the jet. Valved if the drip on disconnect is the bigger nuisance.

Related Products

• Flo-Thru Brass Quick Connect 1/4 inch FPT (BR335)
• Premium Quick Connect 1/4 Inch Male (NA0801)
• Quick Connect 3/8 inch Male (PAF01)

What We See in the Field

When a quick connect becomes hard to couple or starts leaking, look at both halves of the connection. A worn female socket, damaged O-ring or grit inside the coupler can mark a new male plug almost straight away, so replacing only the obvious half can create a repeat failure.

Not sure which end is which? Tell us what it screws into and we will confirm before you order.