bomba caldera viessmann 7840565 termostato digital GNF 41834 X sldb3220 GNF 41834 X Equivalent codes: 49129873 Potencia: diseñada para un caudal y presión óptimos en calderas domésticas asegurando una distribución uniforme del calor y evitando sobrecalentamientos o bloqueos en el circuito
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