Fireboy Liquid Level Monitoring Code NameImagePrice FBYLLM-1HOLDING TANK MONITOR (1) $69.99 FBYLLM-1FFRESH WATER HOLDINGTANK MONITOR (1) $69.99 FBYLLM-22 TANK LIQUID MONITORHOLDING/WATER $78.99 FBYLLM-2HHOLDING TANK MONITOR (2) $78.99 FBYLLM-2FFRESH WATER HOLDING TANK (2) $78.99