Question: What is the best way to clean deep shag carpet or high pile carpet? The vacuum head sinks down into the pile and turns off, stops working.

Answer: The shaggy loose carpet is made by Shaw,
Tufftex (Tuff Tex), Sutton, CabinCrafts, Couture and Queen and others and is known as Shaggy Sheik, Casabella, and Peilcan Hill II and more.

The tufts are about 3/8" in diameter and about 3/8" apart
from each other and about 2.5" long (other varieties vary).

This carpet is too thick to use a roller brush on and there
shouldn't one used any way for the carpet's own protection.

MD Manufacturing has invented a new tool which actually rakes the carpet while it sucks from the center of two rows of long fingers. MD's tool is called "Rug Tool with Tines" (part#402P). It will attack the dirt right out of carpet! In fact many of these long carpet manufacturers recommend "the use of a suction only vacuum for pile construction that is sensitive to brushing or rubbing [by beater brushes]".