what comes in the box? O rings? lube?

Yes, o-rings and really small tube of lube. But I purchased a separate tube of Danco silicone grease to have at hand.

What is the part number for the servicing kit with the o-ring? One poster said it comes with the kit. The video doesn't?

The valve with the o-rings and small tube of silicone gel is all one item, part number GB876851.

I have a kohler forte and it's leaking. should i get this newer model or the previous model gp76851 mixer & pbu sp kit?

Depends how old you valve is. If it is older you should get the gp76851

What are the flow specifications?

Not sure. If you have the kohler 304 valve this is the cartridge for that valve. Its cartridge and balancing spool. Its comes in 2 parts. You can google it and they might be able to tell you the specifications

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KOHLER GP876851 Rite-Temp Pressure-Balancing Cartridge and Mixer Cap Kit, Compatible with KOHLER Shower Valves K-304 and K-11748 Platforms, SINGLE, Black

Product ID: 98186616

Details

Brand
Kohler
Exterior Finish
Bronze
Inlet Connection Size
0.5 inches
Inlet Connection Type
National Pipe
Item dimensions L x W x H
7.5 x 4.5 x
Material
Plastic

⚖️Precision pressure-balancing

🌡️Rite-Temp temperature control

🛠️Easy retrofit installation

128973CFA

Duties & taxes included

In stock

Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🌡️ Stay in control, stay comfortable — upgrade your shower experience with KOHLER Rite-Temp!

SEAMLESS COMPATIBILITY - Designed to perfectly fit KOHLER K-304 & K-11748 shower valves for hassle-free upgrades.
ENGINEERED FOR ENDURANCE - Durable materials resist harsh water conditions for long-lasting, worry-free use.
SAFETY FIRST WITH SMART LIMITS - Built-in temperature limit stop prevents scalding while allowing your ideal max heat.
CONSISTENT COMFORT EVERY SHOWER - Rite-Temp tech keeps water temperature steady, eliminating sudden cold or hot bursts.
GENUINE KOHLER QUALITY ASSURANCE - Official KOHLER parts engineered to maintain peak performance and product longevity.

The KOHLER GP876851 Rite-Temp Pressure-Balancing Cartridge and Mixer Cap Kit ensures stable water temperature by balancing pressure fluctuations. Compatible with KOHLER K-304 and K-11748 shower valves, it features a temperature limit stop for safety and is built from durable materials to withstand aggressive water conditions. This genuine KOHLER part offers easy retrofit installation and meets all required plumbing codes.

Specifications

ASIN	B06XGLQT3R
Best Sellers Rank	#81,500 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #63 in Faucet Trim & Repair Kits
Brand Name	Kohler
Connector Type	Threaded
Customer Reviews	4.6 4.6 out of 5 stars (1,993)
Exterior Finish	Bronze
Global Trade Identification Number	00885612416223
Included Components	GP800820 PBU, GP77759 CAP
Inlet Connection Size	0.5 inches
Inlet Connection Type	National Pipe Tapered
Item Dimensions	7.5 x 4.5 x 2.5 inches
Item Type Name	KOHLER GENUINE PART GP876851 Rite-Temp Mixer and Pressure-Balancing Unit Kit
Manufacturer	Kohler
Manufacturer Part Number	GP876851
Material Type	Plastic
Model Number	GP876851
Number of Ports	2
Outlet Connection Size	0.5 inches
Outlet Connection Type	Barb
Size	SINGLE
Thread Size	0.5 inches
Thread Type	Standard Plumbing Threads
UPC	885612416223
Unit Count	1 Count
Valve Type	pressure balance valve

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