Does this transition 20mm o/d old galvanised steel pipe to modern copper or plastic?

I would imagine so, it's within the range of sizes, as you tighten the fitting it squeezes the o ring onto the pipe, it doesn't have teeth like a standard push fit which can slip on tough materials. Think the water companies use these to get over all sorts of connection issues.

can i use this fitting to join 15mm plastic pipe to 15mm copper pipe

Yes but you will need a liner to support the plastic pipe regards Ray @ EEZY

Can i use this fitting to join lead to copper and from what size can fit

I’m not sure if you can use the phillmac fitting with lead but If your joining from lead to copper you can by a lead lock fitting they come in a variety of sizes and are cheaper

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PHILMAC (UTC 1133) Universal Transition Coupling 15-21mm(O/D) x 15-21mm(O/D) Complete with Liner

Product ID: 83444439

Details

Brand
Philmac
Colour
Copper
Connector type
Coupling
Exterior finish
Copper
Item weight
137 Grams
Material
Poly

📏15-21mm range

🔗Universal fit

⚙️Durable poly

SAR 283

Duties & taxes included

In stock

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Description

🔧 Connect with Confidence!

COMPACT DIMENSIONS - Perfectly sized at 16.1 x 11.2 x 5.8 cm for versatile applications.
LIGHTWEIGHT DESIGN - Weighing only 137 grams, it's easy to handle and install.
NO BATTERIES NEEDED - Ready to use right out of the box—no extra components required.
ROBUST CONSTRUCTION - Made from high-quality poly for long-lasting performance.
SEAMLESS COMPATIBILITY - Easily connects PVC, ABS, copper, and more with one fitting.

The Philmac Universal Transition Coupling (UTC 1133) is a versatile and durable fitting designed to connect a wide range of materials including PVC, ABS, copper, and more. With a lightweight design and compact dimensions, this coupling is perfect for both professional and DIY applications, ensuring seamless compatibility without the need for batteries.

Specifications

ASIN	B07FSTNPQQ
Best Sellers Rank	158,141 in DIY & Tools ( See Top 100 in DIY & Tools ) 143 in Conduit Fittings
Brand	Philmac
Colour	Copper
Connector Type	Coupling
Customer Reviews	4.6 4.6 out of 5 stars (13)
Exterior Finish	Copper
Item Weight	137 Grams
Manufacturer	PHILMAC
Material	Poly
Model Number	UTC 1133
Number of Packs	1
Number of Pieces	1
Part Number	1043
Set Name	False
Size	15-21mm
Thread Type	Metric Parallel
Unit Count	1.0 count

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