NANPU 1 in NPT Air Drying System - Double Filter Regulator Combo

In this review of the NANPU 1 in NPT Air Drying System the bottom line is straightforward: this combo is a practical choice for hobbyists and small shops that need a high-flow filter/regulator with strong particulate removal and ready-to-install hardware. The reviewer found the unit delivers excellent filtering performance thanks to the double 5 micron brass filter elements and a high 176 SCFM flow rating, and it ships with a useful kit including a gauge, fittings and semi-auto drain so setup is quick for standard compressed air lines.

Key Features

• 1 in NPT piggyback combo: combines a filter and regulator in one compact assembly to simplify installation and save space on a compressed air line.
• Double 5 micron brass filter elements: provide fine particulate removal and longer life compared with single-element designs for steady tool protection.
• High flow capacity: rated at 176 SCFM at 90 psi, it supports multiple simple air tools without a large pressure drop.
• Semi-auto drain and polycarbonate bowl: allow easy moisture removal and visual inspection of collected condensate for routine maintenance.
• Complete installation kit: includes a 0-150 gauge and bracket, coupler and plug kit, two 1 in NPT fittings and thread seal tape so everything needed for hookup is included.
• Wide operating range: works from 0-125 psi and across typical shop temperatures, making it suitable for common compressed air applications.

Who It's For

The NANPU combo is best for small machine shops, auto hobbyists, and contractors who need a robust filtration and pressure control solution that handles high flow and comes with installation hardware. The included gauge, couplers and fittings make it convenient for users who do their own plumbing and want a single unit to protect air tools and pneumatic equipment.

It is less appropriate for precision instrument air or applications needing ultra-fine moisture control or integrated lubricators; users with critical zero-leak requirements or very high-end systems should evaluate industrial-grade multi-stage dryers or separate inline solutions.

Pros & Cons

Pros

• High flow rating and solid filtering performance from the double 5 micron brass elements supports multiple tools.
• Good value and convenience because the unit ships with gauge, couplers, fittings and tape for quick installation.
• Semi-auto drain and polycarbonate bowl make condensate management straightforward and visible.
• Wide operating pressure range suits most shop applications up to 125 psi.

Cons

• Some users report mixed build quality and occasional leakage, particularly around fittings or the gauge, so careful assembly and leak checking are recommended.
• Not intended as a replacement for dedicated desiccant dryers when very low dew points are required.

Specifications

Port Size	1 in NPT
Filter Element	Double 5 micron brass
Max Supply Pressure	145 psi
Operating Pressure	0-125 psi
Flow Rate	176 SCFM (5000 L/min) @ 90 psi
Temperature Range	41-140F (5-60C)
Includes	Semi-auto drain, polycarbonate bowl, 0-150 gauge & bracket, couplers, 2 x 1 in NPT fittings, thread seal tape

Our Verdict

The NANPU 1 in NPT Air Drying System is a good value pick for workshops and hobbyists who need strong particulate filtration, high flow capacity and a ready-to-install kit. It excels where cost and convenience matter, though buyers should assemble carefully and check for leaks during installation; for general compressed air tool protection it offers solid performance for the price.

Frequently Asked Questions

Does this unit include installation hardware?
Yes. it ships with a 0-150 gauge and bracket, a pair of coupler and plug kit, two 1 in NPT fittings and thread seal tape so basic hookup is included.

What maintenance does the filter need?
Drain the polycarbonate bowl using the semi-auto drain and replace or clean the double 5 micron brass elements as they accumulate debris to maintain flow and filter efficiency.

Is it suitable for high pressure systems?
The unit accepts a max supply pressure of 145 psi and is rated to operate up to 125 psi; do not exceed those limits and confirm compatibility with your compressor setup.