how do you determine if 1.6gpf or 3.5gpf or other?

If you look on the top cap it should say. WS1 is1.6gal, WS is 3.5gal, and FF is Full Flush- 4.5 gal

what's the different between zurn p6000-eca and zurn p6000-ecr?

Zurn P6000-ECR-WS1-RK is the diaphragm kit for our Aquaflush line : https://www.zurn.com/products/repair-parts/finish-plumbing/flush-valves/manual/parts-by-category/diaphragm-kits/p6000-eca-ws1 The P6000-ECR-WS1-RK is the diaphragm kit for Zurn’s AquaVantage valves: https://www.zurn.com/products/repair-parts/finish-plumbing/flush-valves/manual/parts-by-category/diaphragm-kits/p6000-ecr-ws1

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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AquaFlush Closet Rebuild Kit, P6000-ECR-WS1-RK, 1.6 gpf, Diaphragm Rebuild Kit

AquaFlush Closet Rebuild Kit, P6000-ECR-WS1-RK, 1.6 gpf, Diaphragm Rebuild Kit

Product ID: 201203463

Details

Brand
Zurn
Exterior finish
Plastic
Global Trade Identification Number
Inlet connection size
1.6 Inches
Inlet connection type
National Pipe
Item dimensions L x W x H
7.6 x 7.6 x

🔧Universal NPT 1.6-inch Connections

🚿1.6 GPF WaterSense Certified

⚙️Complete Diaphragm Rebuild Kit

€ 129.30

Duties & taxes included

In stock

Sold byAmazon CroatiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🚿 Upgrade your flush game with precision and eco-conscious power!

TRUSTED DURABILITY - Crafted with high-quality plastic components ensuring corrosion resistance and maintenance ease.
PRO GRADE ENGINEERING - National Pipe Tapered (NPT) 1.6-inch inlet and outlet connections for secure, leak-free fit.
ALL IN ONE RELIABILITY - Comprehensive diaphragm rebuild kit designed for seamless installation and long-lasting valve performance.
ECO FRIENDLY PRECISION - 1.6 gallons per flush meets WaterSense standards for sustainable water use without sacrificing performance.
UNIVERSAL COMPATIBILITY - Fits Zurn AquaVantage, AquaFlush, and Sloan Royal/Regal valve bodies for versatile plumbing solutions.

The Zurn AquaFlush Closet Rebuild Kit (P6000-ECR-WS1-RK) is a WaterSense-certified 1.6 gallons per flush diaphragm rebuild kit engineered for reliable, efficient toilet valve restoration. Compatible with multiple Zurn and Sloan valve bodies, it features durable plastic construction and standard 1.6-inch NPT connections, ensuring a professional-grade, easy-to-install solution that enhances water efficiency and longevity.

Specifications

ASIN	B000M2UDGC
Brand	Zurn
Customer Reviews	4.7 out of 5 stars 314 Reviews
Exterior Finish	Plastic
Exterior finish	Plastic
Global Trade Identification Number	00670240553880
Inlet Connection Size	1.6 Inches
Inlet Connection Type	National Pipe Tapered
Inlet connection size	1.6 Inches
Inlet connection type	National Pipe Tapered
Item Dimensions	7.6 x 7.6 x 7.6 centimetres
Item Weight	36 g
Item dimensions L x W x H	7.6 x 7.6 x 7.6 centimetres
Manufacturer	Zurn
Model Number	P6000-ECR-WS1-RK
Outlet Connection Size	1.6 Inches
Outlet Connection Type	NPT
Outlet connection type	NPT
Part Number	P6000-ECR-WS1-RK
Size	1.6 gpf
Specification Met	WaterSense
Thread Type	NPT
UPC	251171306198 251171306914 670240553880
Unit Count	1.0 count
Valve Type	flush valve

Reviews

G**L

Self cleaning orifice, straight vacuum braker reliable.

Good kit.

7.03.2025

A**R

Works great.

It is what I needed and everything fit and worked great.

18.06.2026

T**S

OEM quality

Not sure if these are rally Zurn products or not but they fit and work perfect. Great price.

2.01.2020

I**E

Saved me from an expensive pluming visit.

I did not need the entire kit but it was priced lower than what my local supply house wanted for just one part! The other pieces have given me peace of mind as they are on the shelf ready for the future. Easy to install.

1.03.2026

M**L

Perfect

Fit and works great. Less than 1/2 the price from buying from a local plumbing store.

19.01.2019

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