would this gauge tell me how much puron is needed in my AC and heat unit?

No. You have to have both gauges low and high then other factors of the system as well. Better off calling a HVAC company. Also need epa license to handle Puron and other refrigerants.

Residue in gauges won't blend refrigerant even a little?

If using a different refrigerant, then you should run some nitrogen gas through them to clean out the residual refrigerant, as it might contaminate Ur system.

I have a r22 Mastercool manifold and hoses. Can just buy the yellow jacket high and low gauges and swap them out?

If you have the space to handle the diameter if they come out at a 45 degree angle you probably would but if they come straight up out of the manifold you may want to measure closely if your current gauge heads are close to the diameter of the yellow jacket then obviously it would work also there are 45 degree adapters available that you probably could put on your current gauges to get those yellow jacket ones to fit if they were too small of spacing

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Yellow Jacket Gauge,3-1/8 in Dia,High Side,Red,800 psi 49137-1 Each

Yellow Jacket Gauge,3-1/8 in Dia,High Side,Red,800 psi 49137-1 Each

Product ID: 12069554

Details

Brand
Yellow Jacket
Item dimensions L x W x H
8.4 x 8.3 x
Material
Metal
Number of Items
1
Thread Type
1/8 Npt

💨800 psi max pressure rating

📏3-1/8 inch precision dial

🔴High-side red gauge for clear visibility

€ 90.63

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Description

🔴 Gauge Your Success with Precision and Power!

MADE IN THE USA - Crafted with quality and reliability from American manufacturing
PRECISION YOU CAN TRUST - 3-1/8 inch diameter dial ensures easy, accurate readings every time
ROBUST 800 PSI CAPACITY - Handles high-side pressures with confidence and durability
HIGH VISIBILITY RED DIAL - Designed for quick identification on high-pressure HVAC systems
TOP RATED INDUSTRIAL ESSENTIAL - Ranked #169 in Industrial Pressure Gauges with 4.7-star user approval

The Yellow Jacket 49137 is a high-side pressure gauge featuring a 3-1/8 inch red dial, engineered for HVAC refrigerants R22, R404A, and R410A. With an 800 psi capacity and American-made metal construction, it delivers reliable, precise pressure readings favored by professionals, backed by strong customer ratings and industrial acclaim.

Specifications

ASIN	B00C2GWR5G
Best Sellers Rank	#96,544 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #169 in Industrial Pressure Gauges
Brand Name	Yellow Jacket
Customer Reviews	4.7 4.7 out of 5 stars (741)
Global Trade Identification Number	00686800491370
Included Components	Product & Instructions Guide
Item Dimensions	8.4 x 8.3 x 5.9 inches
Manufacturer	Fotronic Corporation
Material Type	Metal
Model	49137
Number of Items	1
Number of Packs	1
Part Number	49137
Thread Style	1/8 Npt
UPC	686800491370 794685158926
Unit Count	1 Count

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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TrustScore 4.5 | 7,300+ reviews

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Excellent communication throughout the order process. Product is perfect.

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€ 90.63

Duties & taxes included

In stock

Sold byAmazon CyprusDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Cyprus.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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