Thermostatic radiator valve Pegler Terrier 3 III TRV replaces terrier 2 - Head only The Pegler Terrier TRV Thermostatic Radiator Valve Head is a stylish and efficient addition to any central heating system. Made of durable plastic with a chrome finish, this thermostat-equipped valve head features a rotary knob control style for easy adjustment. this valve head in white colour is designed to provide efficient heating control in any room. The model number 631802
