Will this fit into the fittings used for a model 45?

Yes it will I replaced mine 2 weeks ago and just slotted it into the fitting for the 45Pat

Can you use this with a ceramic sink with the Insinkerator ?

It is suitable for a ceramic sink but you may need to purchase the extended flange depending on your sink

Does it need a air switch

Mine came with an air switch but as I have a switch above the worksurface I did not use it. Unless the model has been revised you don't need the air switch.

I have an old emerson electric model 1-59. is the model 46 the correct replacement ?

Yours is a different model than ours but any model should fit any sink, there all the same size

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InSinkErator Model 46 Waste Disposal Unit - Food Waste Disposal Unit for Sink Use w/Instruction Manual - Kitchen Sink Accessories and Gadgets - ‎15.9 x 15.9 x 31.8 cm - Black

InSinkErator Model 46 Waste Disposal Unit - Food Waste Disposal Unit for Sink Use w/Instruction Manual - Kitchen Sink Accessories and Gadgets - ‎15.9 x 15.9 x 31.8 cm - Black

Product ID: 48903040

Details

Brand
InSinkErator
Capacity
980 ml
Colour
Black
Material
Plastic
Power source
Corded

⚡380W powerful grind tech

🔇Quiet operation, low noise

🛡️Overload protection prevents jams

Description

♻️ Turn scraps into sustainability — join the zero-waste kitchen revolution!

ULTRA FINE GRIND CHAMBER - 980ml capacity crushes waste into flushable particles
SMART OVERLOAD PROTECTION - Prevents jams so you never have to worry about blockages
WHISPER QUIET PERFORMANCE - Operates with minimal noise, keeping your kitchen calm
QUICK SIMPLE INSTALLATION - Fits most sinks with easy Quick Lock mounting and clear instructions
EFFORTLESS FOOD WASTE DISPOSAL - Grinds scraps in seconds for a spotless kitchen experience

The InSinkErator Model 46 is a compact, 380W food waste disposal unit designed for small households. Featuring a 980ml grind chamber and advanced overload protection, it efficiently pulverizes most food waste into fine particles that flush easily through plumbing. Its quiet operation and easy Quick Lock installation make it a seamless upgrade for eco-conscious kitchens aiming to reduce landfill waste and carbon footprint.

Specifications

ASIN	B016MYRXWU
Best Sellers Rank	257,865 in DIY & Tools ( See Top 100 in DIY & Tools ) 312 in Kitchen Sink Accessories
Brand	InSinkErator
Capacity	980 ml
Colour	Black
Customer Reviews	4.6 4.6 out of 5 stars (423)
Global Trade Identification Number	00050375019961
IncludedComponents	InSinkErator
InstallationType	Undercounter
Item Type Name	InsinkErator 77969 46 Waste Disposal
Item Weight	3.5 Kilograms
Manufacturer	InSinkerator
ManufacturerPartNumber	RFISE46
MaterialType	Plastic
Model	RFISE46
Number of Items	1
Number of Packs	1
Power Source	Corded Electric
Product Warranty	2 year manufacturer.
UPC	772040619619 050375019961
Unit Count	1.0 count

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