What is different between type A and B?

This answer must be old since systems purchased after 6/30/2019 also need Type A. The product description states this. I also called the company to confirm this.

will these o rings fit aquapure house filter?

Hello, these are industry standard 3.5" , designed for APEC pre filter housings. We recommend that you check with the manufacturer of your system for their recommendation on O-Rings. If you need any help or assistance, feel free to give us a call we are happy to help! Best Regards, APEC Support Team 800-880-4808.

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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APEC Water Replacement O-Ring Set, 3.5" OD RO System Housings, 3 Pcs, Black | Compatible with ROES-50 and Standard Filter Housings, NSF-Compliant Materials, Lightweight for Easy Installation

Product ID: 83318069

Details

Brand
APEC WATER
Color
Black
Item Diameter
3.5 Inches
Material
NSF-compliant
Nominal Inside Diameter
3.25 Inches

♻️NSF-compliant durable material

⚙️3.5 inch OD standard size

🛠️3-pack precision fit

S$37

Duties & taxes included

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Description

💧 Keep your water pure and your system flawless — don’t let leaks cramp your flow!

LEAK PROOF ASSURANCE - Works flawlessly with food-grade lubricants for a secure seal
SEAMLESS COMPATIBILITY - Perfectly engineered for APEC ROES-50 & 10" standard housings
EFFORTLESS INSTALLATION - Lightweight design for quick, hassle-free replacement
LONG LASTING RELIABILITY - Durable NSF-certified materials ensure up to 2 years of worry-free use
ESSENTIAL MAINTENANCE KIT - 3 O-rings included to keep your water system running flawlessly

This 3-pack of NSF-compliant O-rings is designed for APEC ROES-50 and other 10" standard reverse osmosis filter housings. Lightweight and easy to install, these durable seals ensure leak-proof performance when paired with food-grade lubricants. Recommended replacement every 1-2 years to maintain optimal water filtration efficiency.

Specifications

ASIN	B07HFJDPGC
Best Sellers Rank	#25,575 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #8 in Undersink Water Filtration Replacement Parts
Brand Name	APEC WATER
Color	Black
Customer Reviews	4.7 4.7 out of 5 stars (562)
EU Spare Part Availability Duration	2 Years
Included Components	O-Rings
Item Diameter	3.5 Inches
Item Type Name	O-Ring
Manufacturer	APEC WATER SYSTEMS
Material Type	NSF-compliant materials
Model	O-RING-SET-B
Nominal Inside Diameter	3.25 Inches
Nominal Outside Diameter	3.5 Inches
Number of Pieces	3
Part Number	O-RING-SET-B
Set Name	3-pack
Temperature Range	60 to 100 Degrees Fahrenheit
UPC	851001007532
Unit Count	1 Count

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