does the hose it comes with attach to the tire either screw on or other?

This Compressor set up comes with everything you need and the hose comes with an air chuck on it..and attachments forairing up air matress, balls, etc. if your going to air up all tires if you let the air out for being in sand give it some time to cooloff inbetween each tire, it does a great job! its not a shop compressor with a big air tank but it is faster than most portable units. its been a great tool to have since I go way out on hunts in the boonies and helped out a few stranded peopleand had a tire plug kit handy as well. good way to earn some 12 packs!

Can the psi be controlled to a constant 40psi in order to blow out RV water lines for winterization?

With an external regulator, yes. Google RV Geeks Winterizing and go to t=40 seconds to see their solution when using a 150 PSI Viair compressor to blow out their RV water lines. (Sorry, Amazon won't let me post the link here).

It states it has a 1 year warranty! Yet, no returns. How does the warranty work?

I don't know. It's the seller's policy. You are allowed to email the seller to get the details. Keep clicking on the seller's product section to find the contact link. BTW, this is a heavy duty pump. I had a tire with about 30# and within seconds, it got up to 36#. I recommend the VIAIR 300P.

I need to 'top off' my rv tires up to 125 psi. from anyone with experience... will this compressor work? if you don't know, please don't answer.

Hello, We recommend the 400P-Auto or 400P-RV since the 300P's gauge will only show up to 100psi. Let us know if you have any other questions. Thanks, Viair Corp.

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VIAIR 300P Air Compressor Kit, 12V DC Portable Tire Inflator 2.3 CFM, Offroad 4x4 Air Compressor for Truck, Jeep, SUV Tires, Air Pump for car tires, 150PSI Max working pressure

Product ID: 253412961

Details

Brand
VIAIR
Noise level
73 Decibels
Power source
Battery
Recommended uses for product
Tire Inflation
Voltage
12 Volts

⚡12V heavy-duty power

💨2.3 CFM airflow capacity

⏱️2 min 45 sec fill time

Description

🚙 Inflate Your Adventure — Never Get Stuck, Always Be Ready!

BUILT TO LAST - Durable aluminum body with vibration isolators and thermal overload protection for rugged reliability.
RAPID TIRE REVIVAL - Inflates a 33" tire from 15 to 30 PSI in under 3 minutes—get back on the road fast.
POWER MEETS PORTABILITY - Compact 12V design fits anywhere, ready for any offroad challenge.
COMPLETE READY TO GO KIT - Includes 25 ft 5-in-1 hose, multiple valve adapters, and deluxe carry bag for ultimate convenience.
ALL TERRAIN COMPATIBILITY - Perfect for trucks, SUVs, Jeeps, motorcycles, and even mountain bikes.

The VIAIR 300P is a powerful 12V portable air compressor delivering up to 150 PSI and 2.3 CFM airflow, designed for offroad enthusiasts and professionals alike. Its compact, durable aluminum build includes vibration isolators and thermal protection, ensuring reliable performance on trucks, SUVs, and bikes. With a 25 ft hose and multiple adapters, it inflates large tires quickly and efficiently, making it an essential tool for any adventure or roadside emergency.

Specifications

ASIN	B000X90YUO
ASIN	B000X90YUO
Additional Features	Compact design with fast tire fills
Air Flow Capacity	2.4 Cubic Feet Per Minute
Best Sellers Rank	#25,653 in Automotive ( See Top 100 in Automotive ) #133 in Wheel & Tire Air Compressors & Inflators
Brand Name	VIAIR
Capacity	2.3 cubic feet
Color	Silver
Customer Reviews	4.7 4.7 out of 5 stars (2,391)
Customer reviews	4.7 4.7 out of 5 stars (2,391)
Date First Available	14 August 2012
Department	unisex-adult
Global Trade Identification Number	00818114003004
Hose Length	25 Feet
Included Components	25ft 5-in-1 Inflator/Deflator Air Hose with Inline 100 PSI Gauge, Deluxe carry bag anti-vibration tray and more.Air Hose Length: 25 ft.Power Cord Length: 8 ft
Is Discontinued By Manufacturer	No
Item Dimensions L x W x H	22.9L x 12.4W x 19.1H centimeters
Item Type Name	Portable Air Compressor
Item Weight	3.95 kg
Item model number	30033
Manufacturer	Viair Corporation
Manufacturer	Viair Corporation
Manufacturer Part Number	30033
Material Type	Aluminum
Maximum Current	30 Amps
Maximum Power	414 Watts
Maximum Pressure	150 Pound per Square Inch
Metal Type	Aluminum
Model Name	300P
Model Number	30033
Noise	73 Decibels
Number of Items	1
Number of Packs	1
Part Interchange Info	30033
Power Source	Battery Powered
Product Dimensions	22.86 x 12.45 x 19.05 cm; 3.95 kg
Recommended Uses For Product	Tire Inflation
Style	Air Compressor Kit
Tank Volume	6.9 Cubic Feet
UPC	818114003004
Unit Count	1 Count
Voltage	12 Volts

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