Is it a 1.8, 2.1 or 2.3 mm

The #100775 injector has a 2.1mm orifice.

my pressure washer is 3100psi @ 2.8 gpm. Is this chemical injector the correct/best one for my washer? Thanks in advance for your help -d

This injector may work ok but a better option would be General Pump #100774 which is for 2-3 GPM machines. Amazon item #B01JB6D0YG

I have 3200 psi /2.6gpm would this work and does the tube for trasporting the liquid come included?

I would suggest General Pump Model #100774 (Amazon Item #B01JB6D0YG) which is for 2-3 GPM machines. The suction tube is not included. Amazon item #B00O45UHUU would work great.

What size is the threading ?

Both sides are 3/8" NPT threads.

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⚡ Inject efficiency, inject style!

BUILT TO LAST - Premium brass body ensures corrosion resistance and longevity
ULTRA LIGHTWEIGHT - Weighs just 0.28g for easy handling and minimal bulk
SLEEK PROFESSIONAL - Gold finish adds a touch of sophistication to your equipment
EFFORTLESS INTEGRATION - Quick-connect design for seamless setup with your pressure washer
PRECISION FLOW CONTROL - Optimized 3-5 GPM for consistent chemical injection

The General Pump 100775 Chemical Injector delivers a reliable 3-5 GPM flow rate through a durable brass body, designed for quick-connect compatibility with pressure washers. Its compact, lightweight form factor and corrosion-resistant gold finish make it an essential upgrade for professionals seeking precision and longevity in chemical injection.

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Brand	General Pump
Model Number	100775
Product Dimensions	5.59 x 2.54 x 0.25 cm; 0.28 g
Color	gold
Name List for Name Plates	General Pump, Pump
Material	Brass
Power Source	General
Included Components	Brass chemical injector body only
Are Batteries Included	No
Usage	クイックコネクト。
Item Weight	0.28 g

General Pump 3-5 Gpm Chemical Injector 100775

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