how does it detect leaks?

All fill valves have the "audible" leak detection feature. Fluidmaster has a fill valve that actually stops the float from going down with the water level if there is a leak. It works while you're in Hawaii and hear ocean waves and not your toilet.

How does this device clean the toilet?

It doesn't clean the toilet, it cleans the inside of the tank. It does this by diverting some of the fill water through a tube that sits around the perimeter of the bottom of the tank. Water jets on this tube stir up sediment at the bottom of the tank so it can be flushed down the drain.

I cannot adjust the height. I think it is not correct

I was also stumped by this at first. The trick is to push the little locking tab near the bottom while twisting the unit clockwise from the top. It will only turn about 1/4 turn. In this position the adjustment is unlocked and you can freely (with a little effort) pull it up or push it down. Once you get the top of the unit approximately even with the top of the tank, turn it clockwise 1/4 turn to lock it back in place.

Toilet won’t always flush, it will fill the bowl with more water but won’t always flush?

Sounds like not moving enough water fast enough. Make sure the little hole below the water in the front of the bowl is not clogged. Rotate the adjustment on the float to raise the water level in the tank between a quarter and a half an inch. Staying below the overflow tube.

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

Help Track order

Account Cart

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

Help Track order

Account Cart

Danco Toilet Fill Valve Repair Kit, Blue/White (HC660)

Product ID: 4649221

Details

Brand
Danco
Exterior Finish
Plastic
Inlet Connection Size
0.75 inches
Inlet Connection Type
Fill
Item dimensions L x W x H
3.71 x 3.71 x
Material
Plastic

💧Water-saving tech

🔔Leak detection alert

⚙️Tool-free installation

135.84 DT

Duties & taxes included

In stock

Sold byAmazon TunisiaDelivered 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 Tunisia.

Secure transaction

Description

🚽 Upgrade your flush game—save water, stop leaks, and install like a pro!

LEAK ALERT SYSTEM - Audible notification to catch leaks before they escalate
SELF CLEANING JETS - Powerful jets flush out debris, keeping your tank pristine
EFFORTLESS DIY SETUP - Smart Nut design means no tools needed—install in minutes
RAPID REFILL SHUTOFF - Quick tank refill with easy internal water shutoff for hassle-free repairs
PRECISION WATER CONTROL - Adjusts tank refill from 11" to 13.8" for optimal flush efficiency

The Danco HC660 Toilet Fill Valve Repair Kit is a smart, water-saving solution designed for easy, tool-free installation in most standard toilets. Featuring adjustable height, leak detection with audible alerts, and self-cleaning jets, it ensures efficient flushing while preventing water waste and tank debris buildup. Perfect for DIYers aiming to enhance home plumbing performance with minimal effort.

Specifications

ASIN	B000L87RKC
Best Sellers Rank	#46,499 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #63 in Toilet Flush Valves #4,069 in Kitchen & Bath Fixtures
Brand Name	Danco
Connector Type	Fill
Customer Reviews	4.5 4.5 out of 5 stars (2,432)
Exterior Finish	Plastic
Global Trade Identification Number	00188670000015
Included Components	fill valve
Inlet Connection Size	0.75 inches
Inlet Connection Type	Fill
Item Dimensions	3.71 x 3.71 x 15.75 inches
Item Type Name	Repair Kit
Manufacturer	Next by Danco
Manufacturer Part Number	HC660
Manufacturer Warranty Description	Limited 1 Year
Material Type	Plastic
Model Number	HC660
Number of Items	1
Number of Packs	1
Number of Pieces	1
Outlet Connection Size	0.75 inches
Outlet Connection Type	Fill
Set Name	Danco HC660 Toilet Fill Valve Repair Kit - Pack of 1
Size	Pack of 1
Specification Met	(unset)
Thread Size	NPT
Thread Type	NPT
UPC	188670000015
Unit Count	1 Count
Valve Type	Float Valve

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

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.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Anjali K.

The product quality is outstanding. Exactly what I needed for my work.

1 month ago

Khalid Z.

Great experience from order to delivery. Highly recommended!

1 week ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving millions of shoppers across more than 100 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.

135.84 DT

Duties & taxes included

In stock

Sold byAmazon TunisiaDelivered 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 Tunisia.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Rajesh P.

Customer service was outstanding when I had questions about the product.

2 days ago

Ravi S.

I loved the variety of products available. Will definitely shop again.

2 months ago

View all Trustpilot reviews