Will replace any Balboa VS or EL System when you match it with any TP or SpaTouch topside panel. Can also replace any Balboa BP System while using the existing topside that is already installed on the spa. Circ or Non-Circ Systems-With 7 relays, the BP7 has 32 different setups and can power a spa with 1-4 pumps, including Microsilk systems.These features increase the reliability, ease of installation and serviceability of the control.Features & Benefits MONTRÉAL SPA DEPOTWelcomes you !Please visit my boutique for all Gecko Electronics, Balboa WG®, Waterway & Aqua-Flo pumps original OEM warranty products needs for your spa, hot tub or bath tube This Ebay item is for:Balboa Water Group® Spa pack control main unit: BP7 spa pack, model G4361, with 4kw heater direct replacement of VS510™ Value Pack Retrofit Kit (54218-Z)BalboaWG® BP7 Spa pack controller with 4.0kw/240V (1kw/120V) flo-through heater with M7 system technologyBP7 spa pack features 7-relays controlled with 32 configurations possible.The Next Generation of BP Hot Tub Control Systems is finally hereThe BP family of hot tub control systems were designed using Balboa’s patented M7 temperature and flow sensor technology and a new universal control platform. Item: 353400251264 Balboa water group® BP7 spa pack G4361 w/ 4kw heater, 7-relays, 32 configuration.