We found this at two stores including Walmart. This product sells from $9.50 up to $10.99. Users can save 13% by shopping at Amazon.

Prices are currently low for this product, typically ranging from $12 to $18, and the lowest price we've seen is $8.50.

This product is also marketed as the 

iFJF 385311641, Plastic, Toilet Tank Repair Kits at Walmart

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LisFaxbo 385311641, White ABS Plastic Water Valve at Walmart

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Lomubue 385311641 Water Valve Kit Plastic RV Toilet Valve Parts Water Valve Replacement for 300 310 320 Series Pedal Flush Toilets at Walmart

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385311641 Water Valve Kit Replacement for 300 310 320 Series Camper&Sealand Trailer RV Toilet Pedal Flush Toilets at Amazon

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Kefly 385311641 RV Toilet Water Valve Kit Replacement, Plastic Toilet Water Valve Kit For Dometic and Sealand 300, 301, 310, 311, 320, 321 Series Pedal-Flush Toilets With Hose Clamp and Fasteners 2PCS at Amazon

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385311641 RV Toilet Water Valve Kit Compatible with RV camper Toilets 300 301 310 311 320 321 series Pedal-flush Toilets at Amazon

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385311641 RV Toilet Water Valve Replacement Kit for Dometic and Sealand Toilet Parts, for Dometic and Sealand 300, 301, 310, 311, 320, 321 Series Pedal Flush Toilets, Camper Trailer RV Toilet (2-Pack) at Amazon

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Beech Lane Upgraded Water Valve Kit Replaces 385311641 for Dometic Toilets 300, 310, and 320, Increased Freeze Resistance, Long Valve Lifespan, Ultrasonic Sealing Safeguards Against Leaks (Natural) at Amazon

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385311641 RV Toilet Valve Kit with 385311658 Flush Ball Seal Compatible with Dom.etic and Sealand 300, 301, 310, 311, 320, 321 Series Pedal-Flush Toilets RV Toilet Parts Seal for Camper Toilet - 1 Set at Amazon

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New Durable Plastic Water Valve Kit 385311641 for 300 310 320 series - for Sealand marine toilet replacement at Amazon

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